10001027 
Message
[Customer (business partner code and business partner name) has exceeded credit limit by (amount).]
[Customer (business partner code and business partner name) has exceeded commitment limit by (amount).]
Do you want to add the customer-related items to the pick list?
Diagnosis
In the Pick and Pack Manager window, on the Open drawer, you have selected one or more sales orders, and have chosen the Release to Pick List button.
In the Pick List Details window, you have filled in the relevant details and chosen the Add button.
The message has appeared since in 
Administration 
System Initialization General Settings BP Tab 
customer activity restriction by credit limit,
commitment limit, or both applied on pick lists (Credit Limit, Commitment Limit, and Pick List checkboxes are selected).
Procedure
To continue and create the pick list regardless the deviation from credit or commitment limit, choose the Yes button.
To increase the credit limit or commitment limit defined for the customer, choose
Business Partners Business Partner Master Data Payment Terms and increase the
value shown in the Credit Limit or Commitment Limit field.