do u mean that there is a problem with data in item doctype ??
For example this patch https://github.com/frappe/erpnext/blob/develop/erpnext/patches/v8_7/make_subscription_from_recurring_data.py
modifies oodles of existing documents and reinserts them.
The ValidationError points to a problem with some of them, to be checked and fixed!?
I’m sorry but i’m confused . What should i do ??
Maybe explain your confusion?
sorry i was replying for that issue
My apologies Mahmoud_Ghoneem
I only realize now that likely you are in a hosted environment are not in control here.
For most of us here this is a learning 
1 Like
Try update now @eitadmin
This fixed a patch that failed to check for null date fields
[fix] check for null date fields by saurabh6790 · Pull Request #11334 · frappe/erpnext · GitHub
please help to resolve this error while updating…
raise errorclass, errorvalue
_mysql_exceptions.OperationalError: (1048, “Column ‘is_custom’ cannot be null”)
eitadmin : Try this, it work for me.
bench mysql
ALTER TABLE tabDocPerm DROP COLUMN is_custom;
Exit sql