diff --git a/build/bump.ts b/build/bump.ts
index 1bd3f2c0df..30037ce134 100644
--- a/build/bump.ts
+++ b/build/bump.ts
@@ -100,7 +100,6 @@ function each <T> (callback: (pkg: Package, name: string) => T) {
 }
 
 function bumpPkg (source: Package, flag: BumpType, only = false) {
-  if (!source) return
   const newVersion = source.bump(flag)
   if (!newVersion) return
   const dependents = new Set<Package>()
@@ -135,7 +134,11 @@ const flag = options.major ? 'major' : options.minor ? 'minor' : options.patch ?
   }))
   spinner.succeed()
 
-  args.forEach(name => bumpPkg(getPackage(name), flag, options.only))
+  args.forEach((name) => {
+    const pkg = getPackage(name)
+    if (!pkg) throw new Error(`${name} not found`)
+    bumpPkg(pkg, flag, options.only)
+  })
 
   await Promise.all(each((pkg) => {
     if (!pkg.dirty) return
diff --git a/package.json b/package.json
index 61fca4f584..2026a9e44c 100644
--- a/package.json
+++ b/package.json
@@ -23,11 +23,11 @@
   "version": "1.0.0",
   "license": "MIT",
   "devDependencies": {
-    "@octokit/rest": "^17.0.1",
+    "@octokit/rest": "^17.1.0",
     "@types/cross-spawn": "^6.0.1",
     "@types/fs-extra": "^8.1.0",
     "@types/jest": "^25.1.4",
-    "@types/node": "^13.9.0",
+    "@types/node": "^13.9.1",
     "@types/semver": "^7.1.0",
     "@typescript-eslint/eslint-plugin": "^2.23.0",
     "@typescript-eslint/parser": "^2.23.0",
diff --git a/packages/database-level/package.json b/packages/database-level/package.json
index fdf1a02a31..6969bcb148 100644
--- a/packages/database-level/package.json
+++ b/packages/database-level/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-database-level",
   "description": "Leveldb support for Koishi",
-  "version": "1.1.5",
+  "version": "1.1.6",
   "main": "dist/index.js",
   "files": [
     "dist"
@@ -33,10 +33,10 @@
     "leveldb"
   ],
   "devDependencies": {
-    "koishi-test-utils": "^3.1.4"
+    "koishi-test-utils": "^3.2.1"
   },
   "peerDependencies": {
-    "koishi-core": "^1.11.0"
+    "koishi-core": "^1.11.1"
   },
   "dependencies": {
     "@types/leveldown": "^4.0.2",
diff --git a/packages/database-memory/package.json b/packages/database-memory/package.json
index 73fc0424e2..e01e099146 100644
--- a/packages/database-memory/package.json
+++ b/packages/database-memory/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-database-memory",
   "description": "An in-memory database implementation for Koishi",
-  "version": "1.1.5",
+  "version": "1.1.6",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "files": [
@@ -22,7 +22,7 @@
   },
   "homepage": "https://github.com/koishijs/koishi/tree/master/packages/database-memory#readme",
   "peerDependencies": {
-    "koishi-core": "^1.11.0"
+    "koishi-core": "^1.11.1"
   },
   "dependencies": {
     "koishi-utils": "^1.0.4"
diff --git a/packages/database-mysql/package.json b/packages/database-mysql/package.json
index 87bc779b9e..5fe40353d2 100644
--- a/packages/database-mysql/package.json
+++ b/packages/database-mysql/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-database-mysql",
   "description": "MySQL support for Koishi",
-  "version": "1.1.5",
+  "version": "1.1.6",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "files": [
@@ -35,7 +35,7 @@
     "@types/mysql": "^2.15.9"
   },
   "peerDependencies": {
-    "koishi-core": "^1.11.0"
+    "koishi-core": "^1.11.1"
   },
   "dependencies": {
     "koishi-utils": "^1.0.4",
diff --git a/packages/database-sqlite/package.json b/packages/database-sqlite/package.json
index c10a0d4a5c..54fe50304d 100644
--- a/packages/database-sqlite/package.json
+++ b/packages/database-sqlite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "koishi-database-sqlite",
-  "version": "1.0.0-alpha.11",
+  "version": "1.0.0-alpha.12",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "files": [
@@ -22,10 +22,10 @@
   "homepage": "https://github.com/koishijs/koishi/tree/master/packages/database-sqlite#readme",
   "devDependencies": {
     "@types/sqlite3": "^3.1.6",
-    "koishi-test-utils": "^3.1.4"
+    "koishi-test-utils": "^3.2.1"
   },
   "peerDependencies": {
-    "koishi-core": "^1.11.0"
+    "koishi-core": "^1.11.1"
   },
   "dependencies": {
     "koishi-utils": "^1.0.4",
diff --git a/packages/koishi-cli/package.json b/packages/koishi-cli/package.json
index 3fb2c32fb5..f3caf0508e 100644
--- a/packages/koishi-cli/package.json
+++ b/packages/koishi-cli/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi",
   "description": "A QQ bot framework based on CQHTTP",
-  "version": "1.11.0",
+  "version": "1.11.1",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "files": [
@@ -38,9 +38,9 @@
     "cac": "^6.5.7",
     "js-yaml": "^3.13.1",
     "kleur": "^3.0.3",
-    "koishi-core": "^1.11.0",
-    "koishi-plugin-common": "^2.1.6",
-    "koishi-plugin-schedule": "^1.0.11",
+    "koishi-core": "^1.11.1",
+    "koishi-plugin-common": "^2.1.7",
+    "koishi-plugin-schedule": "^1.0.12",
     "koishi-utils": "^1.0.4",
     "prompts": "^2.3.1"
   }
diff --git a/packages/koishi-core/package.json b/packages/koishi-core/package.json
index 33510401ef..afc4b092d5 100644
--- a/packages/koishi-core/package.json
+++ b/packages/koishi-core/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-core",
   "description": "Core features for Koishi",
-  "version": "1.11.0",
+  "version": "1.11.1",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "files": [
@@ -35,8 +35,8 @@
     "@types/debug": "^4.1.5",
     "@types/ws": "^7.2.2",
     "get-port": "^5.1.1",
-    "koishi-database-memory": "^1.1.5",
-    "koishi-test-utils": "^3.1.4"
+    "koishi-database-memory": "^1.1.6",
+    "koishi-test-utils": "^3.2.1"
   },
   "dependencies": {
     "axios": "^0.19.2",
diff --git a/packages/koishi-core/src/app.ts b/packages/koishi-core/src/app.ts
index f5c43799dc..52facd7bc1 100644
--- a/packages/koishi-core/src/app.ts
+++ b/packages/koishi-core/src/app.ts
@@ -313,13 +313,14 @@ export class App extends Context {
 
     // store parsed message
     Object.defineProperty(meta, '$parsed', {
+      writable: true,
       value: { atMe, nickname, prefix, message },
     })
 
     // parse as command
     if (!meta.$argv && (prefix !== null || nickname || meta.messageType === 'private')) {
       Object.defineProperty(meta, '$argv', {
-        configurable: true,
+        writable: true,
         value: this.parseCommandLine(message, meta),
       })
     }
@@ -339,7 +340,7 @@ export class App extends Context {
           result.options = { ...options, ...result.options }
           result.args.unshift(...args)
           Object.defineProperty(meta, '$argv', {
-            configurable: true,
+            writable: true,
             value: { meta, command, ...result },
           })
           break
@@ -349,7 +350,7 @@ export class App extends Context {
 
     if (!meta.$argv) {
       Object.defineProperty(meta, '$argv', {
-        configurable: true,
+        writable: true,
         value: { meta },
       })
     }
@@ -358,10 +359,7 @@ export class App extends Context {
     if (this.database) {
       if (meta.messageType === 'group') {
         // attach group data
-        const groupFields = new Set<GroupField>(['flag', 'assignee'])
-        this.emitEvent(meta, 'before-group', groupFields, meta.$argv)
-        const group = await this.database.observeGroup(meta.groupId, Array.from(groupFields))
-        Object.defineProperty(meta, '$group', { value: group, writable: true })
+        const group = await this._attachGroup(meta, ['flag', 'assignee'])
 
         // emit attach event
         this.emitEvent(meta, 'attach-group', meta)
@@ -377,13 +375,7 @@ export class App extends Context {
       }
 
       // attach user data
-      const userFields = new Set<UserField>(['flag'])
-      this.emitEvent(meta, 'before-user', userFields, meta.$argv)
-      const defaultAuthority = typeof this.options.defaultAuthority === 'function'
-        ? this.options.defaultAuthority(meta)
-        : this.options.defaultAuthority || 0
-      const user = await this.database.observeUser(meta.userId, defaultAuthority, Array.from(userFields))
-      Object.defineProperty(meta, '$user', { value: user, writable: true })
+      const user = await this._attachUser(meta, ['flag'])
 
       // emit attach event
       this.emitEvent(meta, 'attach', meta)
@@ -438,13 +430,43 @@ export class App extends Context {
     }
   }
 
-  executeCommandLine (message: string, meta: Meta<'message'>, next: NextFunction = noop) {
+  private async _attachGroup (meta: Meta<'message'>, fields: Iterable<GroupField> = []) {
+    const groupFields = new Set<GroupField>(fields)
+    this.emitEvent(meta, 'before-group', groupFields, meta.$argv)
+    const group = await this.database.observeGroup(meta.groupId, Array.from(groupFields))
+    Object.defineProperty(meta, '$group', { value: group, writable: true })
+    return group
+  }
+
+  private async _attachUser (meta: Meta<'message'>, fields: Iterable<UserField> = []) {
+    const userFields = new Set<UserField>(fields)
+    this.emitEvent(meta, 'before-user', userFields, meta.$argv)
+    const defaultAuthority = typeof this.options.defaultAuthority === 'function'
+      ? this.options.defaultAuthority(meta)
+      : this.options.defaultAuthority || 0
+    const user = await this.database.observeUser(meta.userId, defaultAuthority, Array.from(userFields))
+    Object.defineProperty(meta, '$user', { value: user, writable: true })
+    return user
+  }
+
+  async executeCommandLine (message: string, meta: Meta<'message'>, next: NextFunction = noop) {
     if (!('$ctxType' in meta)) this.server.parseMeta(meta)
     const argv = this.parseCommandLine(message, meta)
-    if (argv && !argv.command.getConfig('disable', meta)) {
-      return argv.command.execute(argv, next)
+    if (!argv) return next()
+    Object.defineProperty(meta, '$argv', {
+      writable: true,
+      value: argv,
+    })
+
+    if (this.database) {
+      if (meta.messageType === 'group') {
+        await this._attachGroup(meta)
+      }
+      await this._attachUser(meta)
     }
-    return next()
+
+    if (argv.command.getConfig('disable', meta)) return next()
+    return argv.command.execute(argv, next)
   }
 
   private _applyMiddlewares = async (meta: Meta<'message'>) => {
diff --git a/packages/koishi-core/src/database.ts b/packages/koishi-core/src/database.ts
index e055a27092..d6a80b5874 100644
--- a/packages/koishi-core/src/database.ts
+++ b/packages/koishi-core/src/database.ts
@@ -232,7 +232,7 @@ class DatabaseManager {
 
   injectMethods <S extends SubdatabaseType, T extends TableType> (sub: S, table: T, methods: any) {
     const subdatabase = this.database[sub] as AbstractDatabase
-    if (!this.explicitTables[table] && this.implicitTables[table]) {
+    if (!this.explicitTables[table] && this.implicitTables[table] && this.implicitTables[table] !== sub) {
       throw new Error(`database "${this.implicitTables[table]}" and "${sub}" conflict on table "${table}"`)
     } else if (!this.explicitTables[table] || this.explicitTables[table] === sub) {
       this.implicitTables[table] = sub
diff --git a/packages/plugin-common/package.json b/packages/plugin-common/package.json
index 4dc8413bed..dd65969ce3 100644
--- a/packages/plugin-common/package.json
+++ b/packages/plugin-common/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-plugin-common",
   "description": "Common plugins for Koishi",
-  "version": "2.1.6",
+  "version": "2.1.7",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "author": "Shigma <1700011071@pku.edu.cn>",
@@ -28,11 +28,11 @@
     "plugin"
   ],
   "devDependencies": {
-    "koishi-database-memory": "^1.1.5",
-    "koishi-test-utils": "^3.1.4"
+    "koishi-database-memory": "^1.1.6",
+    "koishi-test-utils": "^3.2.1"
   },
   "dependencies": {
-    "koishi-core": "^1.11.0",
+    "koishi-core": "^1.11.1",
     "koishi-utils": "^1.0.4"
   }
 }
diff --git a/packages/plugin-common/src/contextify.ts b/packages/plugin-common/src/contextify.ts
index 6bf8c7583b..c9e50f0b2f 100644
--- a/packages/plugin-common/src/contextify.ts
+++ b/packages/plugin-common/src/contextify.ts
@@ -14,7 +14,7 @@ export default function apply (ctx: Context) {
       '讨论组聊天没有子类型。',
     ].join('\n'))
     .action(async ({ meta, options }, message) => {
-      if (!message) return meta.$send('请输入要发送的文本。')
+      if (!message) return meta.$send('请输入要触发的指令。')
 
       if (options.member) {
         if (meta.messageType === 'private') {
diff --git a/packages/plugin-common/tests/contextify.spec.ts b/packages/plugin-common/tests/contextify.spec.ts
index cc04392b2a..a301204b5c 100644
--- a/packages/plugin-common/tests/contextify.spec.ts
+++ b/packages/plugin-common/tests/contextify.spec.ts
@@ -21,7 +21,7 @@ beforeAll(async () => {
 })
 
 test('check input', async () => {
-  await session1.shouldHaveReply('ctxf -u 456', '请输入要发送的文本。')
+  await session1.shouldHaveReply('ctxf -u 456', '请输入要触发的指令。')
   await session2.shouldHaveReply('ctxf -m foo show-context', '未指定目标。')
   await session1.shouldHaveReply('ctxf show-context', '请提供新的上下文。')
   await session1.shouldHaveReply('ctxf -u 789 show-context', '权限不足。')
diff --git a/packages/plugin-common/tests/welcome.spec.ts b/packages/plugin-common/tests/welcome.spec.ts
index dc14717b86..7facfbdc88 100644
--- a/packages/plugin-common/tests/welcome.spec.ts
+++ b/packages/plugin-common/tests/welcome.spec.ts
@@ -19,6 +19,10 @@ test('basic support', async () => {
   app.receive(shared)
   await sleep(0)
   app.shouldHaveLastRequest('send_group_msg', { groupId: 123, message: `欢迎新大佬 [CQ:at,qq=456]！` })
+
+  app.receive({ ...shared, userId: app.selfId })
+  await sleep(0)
+  app.shouldHaveNoRequests()
 })
 
 test('check assignee', async () => {
diff --git a/packages/plugin-nlp/package.json b/packages/plugin-nlp/package.json
index 1ca26891ad..df82f0d7d6 100644
--- a/packages/plugin-nlp/package.json
+++ b/packages/plugin-nlp/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-plugin-nlp",
   "description": "Natural Language Processor for Koishi",
-  "version": "1.0.6",
+  "version": "1.0.7",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "author": "Shigma <1700011071@pku.edu.cn>",
@@ -30,10 +30,10 @@
     "jieba"
   ],
   "devDependencies": {
-    "koishi-test-utils": "^3.1.4"
+    "koishi-test-utils": "^3.2.1"
   },
   "dependencies": {
-    "koishi-core": "^1.11.0",
+    "koishi-core": "^1.11.1",
     "koishi-utils": "^1.0.4",
     "nodejieba": "^2.4.1"
   }
diff --git a/packages/plugin-recorder/package.json b/packages/plugin-recorder/package.json
index 6a9f0ee605..61e37cc802 100644
--- a/packages/plugin-recorder/package.json
+++ b/packages/plugin-recorder/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-plugin-recorder",
   "description": "Save Chat Records for Koishi",
-  "version": "1.0.0-alpha.9",
+  "version": "1.0.0-alpha.10",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "author": "Shigma <1700011071@pku.edu.cn>",
@@ -31,10 +31,10 @@
   ],
   "devDependencies": {
     "del": "^5.1.0",
-    "koishi-test-utils": "^3.1.4"
+    "koishi-test-utils": "^3.2.1"
   },
   "dependencies": {
-    "koishi-core": "^1.11.0",
+    "koishi-core": "^1.11.1",
     "koishi-utils": "^1.0.4"
   }
 }
diff --git a/packages/plugin-schedule/package.json b/packages/plugin-schedule/package.json
index c22d3860b4..65b6a2fd80 100644
--- a/packages/plugin-schedule/package.json
+++ b/packages/plugin-schedule/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-plugin-schedule",
   "description": "Schedule plugin for Koishi",
-  "version": "1.0.11",
+  "version": "1.0.12",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "author": "Shigma <1700011071@pku.edu.cn>",
@@ -31,12 +31,12 @@
   ],
   "devDependencies": {
     "@types/ms": "^0.7.31",
-    "koishi-database-level": "^1.1.5",
-    "koishi-database-mysql": "^1.1.5",
-    "koishi-test-utils": "^3.1.4"
+    "koishi-database-level": "^1.1.6",
+    "koishi-database-mysql": "^1.1.6",
+    "koishi-test-utils": "^3.2.1"
   },
   "dependencies": {
-    "koishi-core": "^1.11.0",
+    "koishi-core": "^1.11.1",
     "koishi-utils": "^1.0.4",
     "ms": "^2.1.2"
   }
diff --git a/packages/plugin-teach/package.json b/packages/plugin-teach/package.json
index 319f001f06..4ed7492b9d 100644
--- a/packages/plugin-teach/package.json
+++ b/packages/plugin-teach/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-plugin-teach",
   "description": "Teach plugin for Koishi",
-  "version": "0.1.20",
+  "version": "0.1.21",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "author": "Shigma <1700011071@pku.edu.cn>",
@@ -31,12 +31,12 @@
     "conversation"
   ],
   "devDependencies": {
-    "koishi-database-level": "^1.1.5",
-    "koishi-database-mysql": "^1.1.5",
-    "koishi-test-utils": "^3.1.4"
+    "koishi-database-level": "^1.1.6",
+    "koishi-database-mysql": "^1.1.6",
+    "koishi-test-utils": "^3.2.1"
   },
   "dependencies": {
-    "koishi-core": "^1.11.0",
+    "koishi-core": "^1.11.1",
     "koishi-utils": "^1.0.4"
   }
 }
diff --git a/packages/test-utils/package.json b/packages/test-utils/package.json
index 2c7714fc30..d9191c61aa 100644
--- a/packages/test-utils/package.json
+++ b/packages/test-utils/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koishi-test-utils",
   "description": "Test utilities for Koishi",
-  "version": "3.1.4",
+  "version": "3.2.1",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "files": [
@@ -43,7 +43,7 @@
     "axios": "^0.19.2",
     "debug": "^4.1.1",
     "get-port": "^5.1.1",
-    "koishi-core": "^1.11.0",
+    "koishi-core": "^1.11.1",
     "koishi-utils": "^1.0.4"
   }
 }