Recently we started facing an error like this
The U#380.1cff (EmailSenderAddress) field can't be updated
I have found the following thread https://trailhead.salesforce.com/trailblazer-community/feed/0D5KX00000gUKlZ0AW where other customers are complaining about some security upgrade which blocked every pipeline.
Looks like this security update is about blocking change to the EmailSenderAddress but we do not really change it, which is very weird why do we even receive this error.
Currently I have opened a Sev 1 SF Support Case since this blocks our production release tomorrow

