diff --git a/deploy/migrations/m0022_pipeline_conversations_collation.json b/deploy/migrations/m0022_pipeline_conversations_collation.json
new file mode 100644
index 0000000..00caaa2
--- /dev/null
+++ b/deploy/migrations/m0022_pipeline_conversations_collation.json
@@ -0,0 +1,11 @@
+{
+  "id": "m0022",
+  "title": "pipeline_conversations 归籍 pipeline-service + collation 统一 unicode_ci（消灭代码里的 COLLATE 补丁依赖）",
+  "backup_tables": ["pipeline_conversations"],
+  "up": [
+    {"op": "sql", "sql": "ALTER TABLE pipeline_conversations CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci"}
+  ],
+  "down": [
+    {"op": "sql", "sql": "ALTER TABLE pipeline_conversations CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci"}
+  ]
+}