Change field size

Do you have data in that field?

I was just trying to do the same thing. I think the only way is to use the admin fields section, and remove all the instances of that meta tag field. I think then it should allow the change. at least that's what I'm going to try.

Any news on this? Did it work by removing the field?

Same question here.
Can it be changed in the database?

Is there a solution for this? It would be great to have a way to increase the desc. beyond 160 charters. I do not remember this being an issue with previous releases when D7 first came out.

I'm looking into this currently. There is no reason to disable increasing field length

If you already have data and the size limit field is locked, run this mysql query to change the Meta Description field limit to 255:

Make sure to create a DB backup before you execute these queries. Test first!!

ALTER TABLE field_data_meta_description MODIFY COLUMN meta_description_metatags_quick VARCHAR(255);

ALTER TABLE field_revision_meta_description MODIFY COLUMN meta_description_metatags_quick VARCHAR(255);

update field_config set data = 'a:7:{s:8:"settings";a:2:{s:9:"meta_name";s:11:"description";s:10:"max_length";s:3:"255";}s:12:"entity_types";a:0:{}s:12:"translatable";s:1:"0";s:7:"storage";a:5:{s:4:"type";s:17:"field_sql_storage";s:8:"settings";a:0:{}s:6:"module";s:17:"field_sql_storage";s:6:"active";s:1:"1";s:7:"details";a:1:{s:3:"sql";a:2:{s:18:"FIELD_LOAD_CURRENT";a:1:{s:27:"field_data_meta_description";a:1:{s:14:"metatags_quick";s:31:"meta_description_metatags_quick";}}s:19:"FIELD_LOAD_REVISION";a:1:{s:31:"field_revision_meta_description";a:1:{s:14:"metatags_quick";s:31:"meta_description_metatags_quick";}}}}}s:12:"foreign keys";a:0:{}s:7:"indexes";a:0:{}s:2:"id";s:1:"5";}' where field_name = 'meta_description';

D7 reached its EOL back in January 2025, and there is no active release for D7 for this module anymore.
Development or support is not planned for D7. All D7-related issues are marked as outdated in a bunch.