radius problem

RADIUS cannot run with the following log error:

rlm_sql (sql): Executing select query: SELECT id, nasname, shortname, type, secret, server FROM nas
rlm_sql (sql): rlm_sql_mysql: ERROR 1047 (WSREP has not yet prepared node for application use): 08S01
Failed to load clients from SQL
/etc/raddb/mods-enabled/sql[20]: Instantiation failed for module "sql"

Solved:
by adding the following command in the SQL server:

SET GLOBAL wsrep_provider_options='pc.bootstrap=YES';