Expenditure Batch auto populating Suffix

Summary:

When we create costs with a Particular Expenditure batch (Example 'A') System automatically suffix it with Transaction source ID and unique transaction ID) .

We want to restrict users using same expenditure batch to track the costs. However since system is auto populating the suffix. same multiple costs with same expenditure batch is processed .

Is there any way to disable :-

a) the suffix which is happening

b) Duplicate Expenditure batch.

SS of Auto Suffix:-

Content (required):When we create costs with a Particular Expenditure batch (Example 'A') System automatically suffix it with Transaction source ID and unique transaction ID) .

Version (include the version you are using, if applicable):