feature(conf/code):

web/app/components/app/configuration/config-prompt/advanced-prompt-input.tsx

@@ -227,7 +227,7 @@ const AdvancedPromptInput: FC<Props> = ({
             }}
             variableBlock={{
               show: true,
-              variables: modelConfig.configs.prompt_variables.filter(item => item.type !== 'api').map(item => ({
+              variables: modelConfig.configs.prompt_variables.filter(item => item.type !== 'api' && item.key && item.key.trim() && item.name && item.name.trim()).map(item => ({
                 name: item.name,
                 value: item.key,
               })),

web/app/components/app/configuration/config-prompt/simple-prompt-input.tsx

@@ -110,7 +110,29 @@ const Prompt: FC<ISimplePromptInput> = ({
   const [isShowConfirmAddVar, { setTrue: showConfirmAddVar, setFalse: hideConfirmAddVar }] = useBoolean(false)
 
   const handleChange = (newTemplates: string, keys: string[]) => {
-    const newPromptVariables = keys.filter(key => !(key in promptVariablesObj) && !externalDataToolsConfig.find(item => item.variable === key)).map(key => getNewVar(key, ''))
+    // Filter out keys that are not properly defined (either not exist or exist but without valid name)
+    const newPromptVariables = keys.filter(key => {
+      // Check if key exists in external data tools
+      if (externalDataToolsConfig.find((item: ExternalDataTool) => item.variable === key)) {
+        return false
+      }
+      
+      // Check if key exists in prompt variables
+      const existingVar = promptVariables.find((item: PromptVariable) => item.key === key)
+      if (!existingVar) {
+        // Variable doesn't exist at all
+        return true
+      }
+      
+      // Variable exists but check if it has valid name and key
+      if (!existingVar.name || !existingVar.name.trim() || !existingVar.key || !existingVar.key.trim()) {
+        // Variable exists but doesn't have valid name or key
+        return true
+      }
+      
+      return false
+    }).map(key => getNewVar(key, ''))
+    
     if (newPromptVariables.length > 0) {
       setNewPromptVariables(newPromptVariables)
       setNewTemplates(newTemplates)
@@ -210,14 +232,14 @@ const Prompt: FC<ISimplePromptInput> = ({
             }}
             variableBlock={{
               show: true,
-              variables: modelConfig.configs.prompt_variables.filter(item => item.type !== 'api').map(item => ({
+              variables: modelConfig.configs.prompt_variables.filter((item: PromptVariable) => item.type !== 'api' && item.key && item.key.trim() && item.name && item.name.trim()).map((item: PromptVariable) => ({
                 name: item.name,
                 value: item.key,
               })),
             }}
             externalToolBlock={{
               show: true,
-              externalTools: modelConfig.configs.prompt_variables.filter(item => item.type === 'api').map(item => ({
+              externalTools: modelConfig.configs.prompt_variables.filter((item: PromptVariable) => item.type === 'api').map((item: PromptVariable) => ({
                 name: item.name,
                 variableName: item.key,
                 icon: item.icon,

web/app/components/app/configuration/config/agent/prompt-editor.tsx

@@ -107,7 +107,7 @@ const Editor: FC<Props> = ({
             }}
             variableBlock={{
               show: true,
-              variables: modelConfig.configs.prompt_variables.map(item => ({
+              variables: modelConfig.configs.prompt_variables.filter(item => item.key && item.key.trim() && item.name && item.name.trim()).map(item => ({
                 name: item.name,
                 value: item.key,
               })),