We have hit the limit for custom fields and need to increase it to create new ones.

Cause

Each Salesforce edition has a defined limit on the number of custom fields that can be created per object.

This error occurs because the organization has reached the maximum number allowed for the current edition.

Resolution

Salesforce Support cannot increase the limit on the number of custom fields.

The only way to increase the limit and create additional custom fields is to upgrade to a higher edition that allows for more custom fields.
*Please contact your Account Executive regarding edition upgrades.

Please refer to the following Help article for specific limits per edition.