problem in zone file

hi. After updating cpanel, I encountered a problem I get bellow error in cpanel: Failed to serialize zone file. Error was "There was an error while loading the zone for domain.com. Please correct any errors in this zone manually and try again. The exact error from the parser was: syntax error, line 33: [% 0] ". The dnszone file of some domains has a problem when I modify the zone file related to the same domain from the path below and the problem is solved /var/named/domain.com.db But after creating a new record through the cpanel again, the same error is observed And at the end of the domain.com.db file, a% sign is created, which causes a problem What is the cause of this problem? How can I fix it? best regards