10000542 
Message
Do you want to insert the new default values into all the existing instances of this user-defined field?
Diagnosis
In the Field Data window, you have changed the status of a user-defined field to mandatory by selecting the Mandatory checkbox.
You have selected the Set Default Value for Field checkbox and in the adjacent field you have entered a default value.
A system message has appeared:
Do you want to insert the new default values into all the existing instances of this user-defined field?
The user-defined field that you are attempting to update already exists in some documents in SAP Business One. These fields are empty and do not contain the new default value.
Procedure
Do one of the following:
Choose the Yes button to insert the new default values into all the existing instances of this user-defined field.
Choose the No button to continue with the update of the user-defined field status and default value. The new default value will not be inserted into existing instances of this user-defined field. However, the new default value will appear in the open instance, and in all subsequent instances.