I need to change the Minimum Value and Maximum value of a rollup field after it’s created.

Deleting the field is not an option for me (as it is a managed solution and the original solution is changed too much and installing an update is so complicated)
So I need to change the minimum value (it’s set as 1 and when there are non related records , I cannot save the record)

I’m on an on-premises environment so :

Changing anything anything including editing SQL etc. is something worth to try for me.

Thanks