Edit product gives Out of memory (allocated 66322432) prepare.php on line 176


Running 2.2.3

For some odd reason, only when trying to edit a products, I get this error

Fatal error: Out of memory (allocated 66322432) (tried to allocate 46 bytes) in /home/futotexn/public_html/prepare.php on line 176

I have tried changing the config.local.php and the php.ini but nothing seems to resolve it.

any help would be appreciated