Unknown column 'disable_symlinknotowner' in 'field list' error

Like other people. I'm getting this error when I attempt to change anything in the Custom php.ini section in the Options tab. The error pops up when I attempt to save the changes.
I followed the corrections given in the Priority support area for someone else experiencing this same problem. however, when I execute the SQL:
ALTER TABLE `web_domain` ADD `disable_symlinknotowner` enum('n','y') NOT NULL default 'n' AFTER `last_jailkit_hash`;
I get the error:
#1118 - Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs

Any suggestion?
Thanks
Norm

 

The server uses the latest patch level of ISPConfig (3.2.12p1) running on CentOS 7, with MariaDB 10.6.18.