Zoho Inventory/Books - Custom Fields Delete

Zoho Inventory/Books - Custom Fields Delete

Hello

We are trying to remove product custom field and get this error

"
  • Transactions have been created with the custom field. Hence it cannot be deleted.
"
We have deleted all sales/purchase orders on books and still egt this.

We did not know these custom fields would be permanent!

Question: If we mark these fields as INACTIVE - does this affect the MAX Custom fields allowed

Lets say we mark 7 custom fields INACTIVE, can we then add 7 more instead?