error while alter db

src/mnode/src/mgmtDb.c

@@ -811,7 +811,6 @@ static SDbCfg mgmtGetAlterDbOption(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
   if (replications > 0 && replications != pDb->cfg.replications) {
     mTrace("db:%s, replications:%d change to %d", pDb->name, pDb->cfg.replications, replications);
     newCfg.replications = replications;
-  } 
 
     if (replications > mgmtGetDnodesNum()) {
       mError("db:%s, no enough dnode to change replica:%d", pDb->name, replications);
@@ -822,9 +821,10 @@ static SDbCfg mgmtGetAlterDbOption(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
       mError("db:%s, replica number can't change from 3 to 1", pDb->name, replications);
       terrno = TSDB_CODE_INVALID_OPTION;
     }
+  }
 
-  if (walLevel < TSDB_MIN_WAL_LEVEL || walLevel > TSDB_MAX_WAL_LEVEL) {
-    mError("db:%s, wal level should be between 0-2", pDb->name);
+  if (walLevel > 0 && (walLevel < TSDB_MIN_WAL_LEVEL || walLevel > TSDB_MAX_WAL_LEVEL)) {
+    mError("db:%s, wal level %d should be between 0-2, origin:%d", pDb->name, walLevel, pDb->cfg.walLevel);
     terrno = TSDB_CODE_INVALID_OPTION;
   }