remove repeated key limit

Author: mdj33

system/dapp/manage/commands/config.go

@@ -50,7 +50,7 @@ func addConfigTxFlags(cmd *cobra.Command) {
 	cmd.Flags().StringP("config_key", "c", "", "config key string")
 	cmd.MarkFlagRequired("config_key")
 
-	cmd.Flags().StringP("operation", "o", "", "adding or deletion operation")
+	cmd.Flags().StringP("operation", "o", "", "add or delete object")
 	cmd.MarkFlagRequired("operation")
 
 	cmd.Flags().StringP("value", "v", "", "operating object")
@@ -91,7 +91,7 @@ func addConfigApplyFlags(cmd *cobra.Command) {
 	cmd.Flags().StringP("config_key", "c", "", "config key string")
 	cmd.MarkFlagRequired("config_key")
 
-	cmd.Flags().StringP("operation", "o", "", "adding or deletion operation")
+	cmd.Flags().StringP("operation", "o", "", "add or delete object")
 	cmd.MarkFlagRequired("operation")
 
 	cmd.Flags().StringP("value", "v", "", "operating object")

system/dapp/manage/executor/managedb.go

@@ -146,11 +146,6 @@ func (a *action) applyConfig(apply *mty.ApplyConfig) (*types.Receipt, error) {
 		return nil, errors.Wrapf(mty.ErrBadConfigOp, "op=%s", apply.Config.Op)
 	}
 
-	_, err := a.db.Get([]byte(types.ManageKey(apply.Config.Key)))
-	if err == nil {
-		return nil, errors.Wrapf(types.ErrNotAllow, "key=%s existed", apply.Config.Key)
-	}
-
 	configStatus := &mty.ConfigStatus{
 		Id:       common.ToHex(a.txhash),
 		Config:   apply.Config,