diff --git a/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx b/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx
index 528f64f41a..5ce1801243 100644
--- a/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx
+++ b/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx
@@ -112,7 +112,7 @@ const PopupContainer: React.FC<Props> = ({ title, resolve }) => {
           return
         }
 
-        if (autoDims || typeof values.dimensions === 'undefined') {
+        if (autoDims || values.dimensions === undefined) {
           try {
             const aiProvider = new AiProvider(provider)
             values.dimensions = await aiProvider.getEmbeddingDimensions(selectedEmbeddingModel)
@@ -132,7 +132,7 @@ const PopupContainer: React.FC<Props> = ({ title, resolve }) => {
           name: values.name,
           model: selectedEmbeddingModel,
           rerankModel: selectedRerankModel,
-          dimensions: values.dimensions,
+          dimensions: autoDims ? undefined : values.dimensions,
           documentCount: values.documentCount || DEFAULT_KNOWLEDGE_DOCUMENT_COUNT,
           items: [],
           created_at: Date.now(),
diff --git a/src/renderer/src/types/index.ts b/src/renderer/src/types/index.ts
index beb93bdf44..340119fa31 100644
--- a/src/renderer/src/types/index.ts
+++ b/src/renderer/src/types/index.ts
@@ -423,7 +423,7 @@ export interface KnowledgeBase {
   id: string
   name: string
   model: Model
-  dimensions: number
+  dimensions?: number
   description?: string
   items: KnowledgeItem[]
   created_at: number