diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts
index 4b9b6e40d4dda..41554a1df120c 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts
@@ -137,18 +137,16 @@ export const createRulesBulkRoute = (router: IRouter, ml: SetupPlugins['ml']) =>
                   message: `To create a rule, the index must exist first. Index ${finalIndex} does not exist`,
                 });
               }
-              if (ruleId != null) {
-                if (
-                  foundRules != null &&
-                  foundRules.length > 0 &&
-                  foundRules.find((rule) => rule.params.ruleId === ruleId)
-                ) {
-                  return createBulkErrorObject({
-                    ruleId,
-                    statusCode: 409,
-                    message: `rule_id: "${ruleId}" already exists`,
-                  });
-                }
+              if (
+                ruleId != null &&
+                foundRules != null &&
+                foundRules.some((rule) => rule.params.ruleId === ruleId)
+              ) {
+                return createBulkErrorObject({
+                  ruleId,
+                  statusCode: 409,
+                  message: `rule_id: "${ruleId}" already exists`,
+                });
               }
               const createdRule = await createRules({
                 alertsClient,
diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/import_rules_route.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/import_rules_route.ts
index 7d5a4dedfe512..80fc5d8e70421 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/import_rules_route.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/import_rules_route.ts
@@ -194,10 +194,7 @@ export const importRulesRoute = (router: IRouter, config: ConfigType, ml: SetupP
 
                   throwHttpError(await mlAuthz.validateRuleType(type));
 
-                  let rule;
-                  if (rules != null) {
-                    rule = rules.find((aRule) => aRule.params.ruleId === ruleId);
-                  }
+                  const rule = rules?.find((aRule) => aRule.params.ruleId === ruleId);
 
                   if (rule == null) {
                     await createRules({
diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts
index ec32dadc6a7c7..70e1a9743d201 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts
@@ -25,6 +25,7 @@ import { updateRulesNotifications } from '../../rules/update_rules_notifications
 import { ruleStatusSavedObjectsClientFactory } from '../../signals/rule_status_saved_objects_client';
 import { readRules } from '../../rules/read_rules';
 import { PartialFilter } from '../../types';
+import { RuleAlertType } from '../../rules/types';
 
 export const patchRulesBulkRoute = (router: IRouter, ml: SetupPlugins['ml']) => {
   router.patch(
@@ -58,7 +59,7 @@ export const patchRulesBulkRoute = (router: IRouter, ml: SetupPlugins['ml']) =>
         }
         return acc;
       }, []);
-      const foundRules = await readRules({
+      const foundRules: RuleAlertType[] | null = await readRules({
         alertsClient,
         ruleIds,
         id: undefined,
@@ -118,14 +119,12 @@ export const patchRulesBulkRoute = (router: IRouter, ml: SetupPlugins['ml']) =>
               throwHttpError(await mlAuthz.validateRuleType(type));
             }
 
-            const foundRule = foundRules?.find((rule) => rule.params.ruleId === ruleId);
-            let existingRule = foundRule != null ? [foundRule] : null;
-            if (foundRule == null) {
-              // try the id
-              existingRule = await readRules({ alertsClient, ruleIds: undefined, id });
-            }
+            const searchedRule = foundRules?.find((rule) => rule.params.ruleId === ruleId);
+            const existingRule = searchedRule
+              ? [searchedRule]
+              : await readRules({ alertsClient, ruleIds: undefined, id });
 
-            if (existingRule != null && existingRule.length > 0 && existingRule[0].params.type) {
+            if (existingRule != null && existingRule[0].params.type) {
               // reject an unauthorized modification of an ML rule
               throwHttpError(await mlAuthz.validateRuleType(existingRule[0].params.type));
             }