diff --git a/tag_generator.sh b/tag_generator.sh
index f83b2c54..35529ba2 100755
--- a/tag_generator.sh
+++ b/tag_generator.sh
@@ -15,7 +15,9 @@ if [ "$tags_length" -lt 1 ]; then
   next_tag="v1.0.0"
 else
   newest_tag=$(echo "$tags" | head -n 1)
-  IFS='.' read -r major minor patch <<< "$newest_tag"
+  # 去除已有的sky_前缀，防止重复
+  base_tag=${newest_tag#sky_}
+  IFS='.' read -r major minor patch <<< "$base_tag"
   major="${major#v}"
   compare_json=""
   if [[ "$1" == "generate_tag" ]];then