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Use
The PSA offers you the option of checking and changing data before you update it further from the PSA table in the communication structure and in the current data target.
You can check and change data records to

If lower case letters or characters that are not permitted have been used in fields, you can remove this error in the PSA.

For example, if, when matching data, it was discovered that a customer should have been given free delivery for particular products, but the delivery had in fact been billed, then you can change the data record accordingly in the PSA.
Prerequisites
You have determined the PSA transfer method in the maintenance of the transfer rules for an InfoSource, and have already loaded data into the PSA.
Procedure
You have two options for checking and changing the data:
You get to a dialog box where you can choose which data packet and which data records for this packet you want to edit.
You get to the request data maintenance screen.

If you change the number of records for a request in the PSA, meaning adding or deleting records, a correct record count in the BW monitor is no longer guaranteed when posting or processing a request.
Therefore, we recommend not changing the number of records for a request in the PSA.
Result
The corrected data is now available for continued updates. You can find information on update options from the PSA in the section
Types of Data Update in the PSA under Updating from the PSA.