Database startup message: ora-29702: error occurred in cluster group service

One ORACLE 11G RAC colony , For various reasons , No cluster , Using stand-alone , Delete GI part , contain GRID user , then , Start database , Report the following error ：
$ sqlplus /nolog
SQL*Plus: Release 11.2.0.4.0 Production on Mon Jun 13 20:18:20 2022
Copyright (c) 1982, 2013, Oracle. All rights reserved.
SQL> conn / as sysdba
Connected to an idle instance.
SQL> startup nomount pfile='/home/oracle/initxxdb.ora';
ORA-29702: error occurred in Cluster Group Service operation
For this mistake , You can choose to turn off parallelism .
The specific solutions are as follows ：
1. Turn off parallel
$ cd $ORACLE_HOME/rdbms/lib
$ make -f ins_rdbms.mk no_parropt
2. recompile
$ make -f ins_rdbms.mk install
3. Just open the database
SQL> startup nomount;
 

ORACLE instance started.