diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index 945447b00..f81db8726 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -2,6 +2,14 @@
 
 更新日志文档，版本顺序从新到旧，最新版本在最前(上)面。
 
+# 0.15.10
+
+## 问题修复
+
+- 修复条目收藏的异常问题 674
+- 修复条目移除后未移除对应收藏的问题 674
+- 条目更新封面字段时异常移除相关条目封面字段 #675
+
 # 0.15.9
 
 - 支持Prometheus的指标聚合API #676
diff --git a/gradle.properties b/gradle.properties
index 4498ef81b..4a8116427 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1 +1 @@
-version=0.15.9
+version=0.15.10
diff --git a/server/src/main/java/run/ikaros/server/core/attachment/listener/AttachmentSubjectCoverChangeListener.java b/server/src/main/java/run/ikaros/server/core/attachment/listener/AttachmentSubjectCoverChangeListener.java
index 80c3dd95b..69c040e97 100644
--- a/server/src/main/java/run/ikaros/server/core/attachment/listener/AttachmentSubjectCoverChangeListener.java
+++ b/server/src/main/java/run/ikaros/server/core/attachment/listener/AttachmentSubjectCoverChangeListener.java
@@ -81,7 +81,13 @@ public Mono<Void> onSubjectCoverUpdate(SubjectUpdateEvent event) {
 
         return attachmentRepository.findByUrl(oldCover)
             .map(AttachmentEntity::getId)
-            .flatMapMany(attachmentReferenceRepository::deleteAllByAttachmentId)
+            .flatMap(oldCoverAttId -> attachmentReferenceRepository
+                .deleteByTypeAndAttachmentIdAndReferenceId(
+                    AttachmentReferenceType.SUBJECT,
+                    oldEntity.getId(),
+                    oldCoverAttId
+                ).doOnSuccess(unused ->
+                    log.debug("Delete attachment Reference by type and att id and sub id.")))
             // update new attachment that move to cover dir
             .then(attachmentRepository.findByTypeAndParentIdAndName(AttachmentType.Directory,
                 AttachmentConst.ROOT_DIRECTORY_ID, AttachmentConst.COVER_DIR_NAME))
@@ -91,12 +97,20 @@ public Mono<Void> onSubjectCoverUpdate(SubjectUpdateEvent event) {
                 .map(entity -> entity.setParentId(coverDirAttId)))
             .flatMap(attachmentRepository::save)
             .map(AttachmentEntity::getId)
-            .map(attId -> AttachmentReferenceEntity.builder()
-                .type(AttachmentReferenceType.SUBJECT)
-                .attachmentId(attId)
-                .referenceId(newEntity.getId())
-                .build())
-            .flatMap(attachmentReferenceRepository::save)
+            .flatMap(attId -> attachmentReferenceRepository
+                .findByTypeAndAttachmentIdAndReferenceId(AttachmentReferenceType.SUBJECT,
+                    attId, newEntity.getId())
+                .switchIfEmpty(attachmentReferenceRepository.save(
+                    AttachmentReferenceEntity.builder()
+                        .type(AttachmentReferenceType.SUBJECT)
+                        .attachmentId(attId)
+                        .referenceId(newEntity.getId())
+                        .build()
+                ).doOnSuccess(entity ->
+                    log.debug("Create attachment Reference by type and att id and sub id: [{}].",
+                        entity)))
+            )
+
             .then();
     }
 }
diff --git a/server/src/main/java/run/ikaros/server/core/collection/CollectionSubjectRemoveEventListener.java b/server/src/main/java/run/ikaros/server/core/collection/CollectionSubjectRemoveEventListener.java
new file mode 100644
index 000000000..a8ad5661e
--- /dev/null
+++ b/server/src/main/java/run/ikaros/server/core/collection/CollectionSubjectRemoveEventListener.java
@@ -0,0 +1,35 @@
+package run.ikaros.server.core.collection;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+import reactor.core.publisher.Mono;
+import run.ikaros.server.core.subject.event.SubjectRemoveEvent;
+import run.ikaros.server.store.entity.SubjectEntity;
+import run.ikaros.server.store.repository.SubjectCollectionRepository;
+
+@Slf4j
+@Component
+public class CollectionSubjectRemoveEventListener {
+    private final SubjectCollectionRepository subjectCollectionRepository;
+
+    public CollectionSubjectRemoveEventListener(
+        SubjectCollectionRepository subjectCollectionRepository) {
+        this.subjectCollectionRepository = subjectCollectionRepository;
+    }
+
+    /**
+     * Listen subject remove event.
+     */
+    @EventListener(SubjectRemoveEvent.class)
+    public Mono<Void> onSubjectAdd(SubjectRemoveEvent event) {
+        SubjectEntity entity = event.getEntity();
+        if (entity == null) {
+            return Mono.empty();
+        }
+        return subjectCollectionRepository.removeAllBySubjectId(entity.getId())
+            .doOnSuccess(unused -> log.debug("Subject collections removed by subject id: {}",
+                entity.getId()))
+            .then();
+    }
+}
diff --git a/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionImpl.java b/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionImpl.java
index 2cb520f36..8ba10ebe2 100644
--- a/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionImpl.java
+++ b/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionImpl.java
@@ -181,8 +181,6 @@ public Mono<SubjectCollection> findCollection(Long userId, Long subjectId) {
         Assert.isTrue(subjectId >= 0, "'subjectId' must >= 0");
         return checkUserIdExists(userId)
             .then(subjectRepository.findById(subjectId))
-            .switchIfEmpty(Mono.error(
-                new SubjectNotFoundException("Subject not found for id: " + subjectId)))
             .flatMap(subjectEntity -> copyProperties(subjectEntity, new SubjectCollection()))
             .flatMap(subjectCollection ->
                 subjectCollectionRepository.findByUserIdAndSubjectId(userId, subjectId)
diff --git a/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionService.java b/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionService.java
index 9c7b435a1..768b63c20 100644
--- a/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionService.java
+++ b/server/src/main/java/run/ikaros/server/core/collection/SubjectCollectionService.java
@@ -22,6 +22,13 @@ Mono<Void> collect(Long userId, Long subjectId,
     @Transactional
     Mono<Void> unCollect(Long userId, Long subjectId);
 
+    /**
+     * Find subject collection with userId and subjectId.
+     *
+     * @param userId    user id
+     * @param subjectId subject id
+     * @return subject collection or null
+     */
     Mono<SubjectCollection> findCollection(Long userId, Long subjectId);
 
     Mono<PagingWrap<SubjectCollection>> findCollections(Long userId, Integer page,
diff --git a/server/src/main/java/run/ikaros/server/store/repository/SubjectCollectionRepository.java b/server/src/main/java/run/ikaros/server/store/repository/SubjectCollectionRepository.java
index 5dddf3177..bdfb2cdff 100644
--- a/server/src/main/java/run/ikaros/server/store/repository/SubjectCollectionRepository.java
+++ b/server/src/main/java/run/ikaros/server/store/repository/SubjectCollectionRepository.java
@@ -16,4 +16,6 @@ public interface SubjectCollectionRepository
     Mono<Long> countAllByUserId(Long userId);
 
     Mono<Long> countByType(CollectionType type);
+
+    Mono<Void> removeAllBySubjectId(Long subjectId);
 }