Although data such as TCV may be updated when the Quote screen is displayed, I think that it is better to lock the target record at that time. I added a button to call the process to set RecordTypeId to "ReadOnly" on the screen, but depending on the timing, it will return to "Default". It seems that the process called by the trigger has been overwritten with the previous value. I think that it is better to make it impossible to change from the outside when processing is performed in the back end such as trigger.
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