How To Fix TPM0105 - Change to the transaction data is not permitted (see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: TPM0 - TR position management

• Message number: 105

• Message text: Change to the transaction data is not permitted (see long text)

What causes this issue?

You want to change at least one of the following values for the current
transaction:

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Company code
ID number
Securities account
Long/short indicator
This change is not permitted, since flows have already been assigned to
to the single position generated by the transaction. This allocation
would no longer be consistent if the transaction data was to be
changed.

System Response

The change is rejected.

How to fix this error?

Change the values back to the original values.
Alternatively, you can terminate processing, reverse the flows assigned
to the single position and then re-enter the changes to the transaction
data.

Error message extract from SAP system. Copyright SAP SE.