3070364 - Error "Custom field <FieldID> could not be updated" when saving custom fields changes after increasing field length

• The following error is seen after increasing the length of a custom field and trying to save the change:
  • Custom field <FieldID> could not be updated
• There is no error when increasing the length by a smaller amount

• SAP S/4HANA Cloud
• Custom Fields app

1. Edit an existing custom field
2. Increase the length of the field
3. Click the "Save" button
4. Error is displayed after a brief time

The capacity of the associated business context is full.

Increase the field by a lesser amount that does not exceed the available capacity of the associated business context.

Regarding business context capacity, keep the following in mind:

• "On average, you can create 100 fields per business context and you have 1000 characters available for all business contexts, except Coding Block. You can see the currently available space when adding a new custom field in the Business Context Capacity indicator. The amount of capacity that a field requires depends on its type and the defined length. You can also check the remaining capacity in the Extensibility Cockpit."

Business context capacity details documented here:

Before Getting Started - help.sap.com - S/4HANA Cloud - Extend and Integrate Your SAP S/4HANA Cloud

increase field length text custom business context capacity s/4hana cloud s/4 hana , KBA , BC-SRV-APS-EXT-FLD , Custom Fields , Problem