diff --git a/astrbot/core/provider/sources/gemini_source.py b/astrbot/core/provider/sources/gemini_source.py
index 038d57751..8600d3e9f 100644
--- a/astrbot/core/provider/sources/gemini_source.py
+++ b/astrbot/core/provider/sources/gemini_source.py
@@ -264,15 +264,16 @@ class ProviderGoogleGenAI(Provider):
         content_num = len(gemini_contents)
         for i in range(content_num):
             expected_type = types.UserContent if i % 2 == 0 else types.ModelContent
-            if not isinstance(gemini_contents[i], expected_type):
-                for j in range(i + 1, content_num):
-                    if isinstance(gemini_contents[j], expected_type):
-                        logger.debug(f"交换索引 {i} 与 {j}")
-                        gemini_contents[i], gemini_contents[j] = (
-                            gemini_contents[j],
-                            gemini_contents[i],
-                        )
-                        break
+            if isinstance(gemini_contents[i], expected_type):
+                continue
+            for j in range(i + 1, content_num):
+                if isinstance(gemini_contents[j], expected_type):
+                    logger.debug(f"交换索引 {i} 与 {j}")
+                    gemini_contents[i], gemini_contents[j] = (
+                        gemini_contents[j],
+                        gemini_contents[i],
+                    )
+                    break
 
         return gemini_contents