I have moved my SQL Server RDS instance from one project to another. That has involved various stack import/change/export iterations, to get the name and identifier values from the old stack to be used successfully in the new stack, so that Pulumi doesn't try to delete my database. (It's pretty laborious stuff, and I can't use "alias" because the code is in a ComponentResource that is shared between multiple stacks, so there are multiple "aliases" involved). The process has worked for lots of other resources, and seems to have worked for this DB. But somehow I've got myself into a situation where any updates detected by Pulumi cause this exception:

panic: fatal: An assertion has failed: Expected diff to not require deletion or replacement during Update of urn😛ulumi:core:😒hared-resources:😛ams:aws:ManagedDb$aws:rds/instance:Instance::mydb