Zapier integration error

hello there

as i was integrating zapier with mautic to google sheet

as there was error

as i asked zapier support but they replied

as i tried to clear cache and tried some google search but it din make

can any one help me here

T me this looks like a known issue with the database size of mautic. How many custom fields do you have at the moment ?

I had many fields and what I had to do was change the size of the fields from varchar 255 to varchar90 or something like that.

where do i find this size and how do i change this