fix Prestashop meta description error

When attempting to change any info about a product I am getting this message "The meta_keywords field is too long (255 chars max)". Only happens with some products. I change the meta description length and try to change the price of the product for example and then save. Prestashop simply reverts to the original meta description and price and will not save any changes made.

Using Prestashop ver. 1.6.124