Issues:
you entered “ERROR: Field ‘field id’ Not Found” into a field where a numeric value was expected. Please go back and change this value to a number.
Reason for the error: When a field is sourced from a deleted field and when trying to save the record with the field that is sourced the issue will arise and will not be able to save the record.
How to solve the error:
Deleted the sourcing of the field, under the validation and source of the field record. Source the field from the field which is active or exit.