10001152 
Message
Batch [batch number] quantity already allocated; select new batch or batches
Diagnosis
You have attempted to create a sales document for an item managed by batches, but some or all of the batch quantity has already been allocated to a different sales document. Therefore, there is not enough quantity available to fulfill the sales document.
Procedure
Follow the steps below:
In the sales document, press CTRL+TAB in the Quantity field. The Batch Number Selection window appears.
Allocate other available batches and choose the OK button to update the quantities in the sales document.