Not sure if this is a bug and/or if it is isolated to 7.x-1.7
Trying to switch from SHA-1 to anything else
Going to Checksum Configuration > Checksum type > change value to another value
Select Collection > click enable
Appears to work. Click Save
Go to collection object > manage > PREMIS
Still original value, no change was was made.
Checked in Fedora and it's the same as the original. It says SHA-1. (Not sure if this mean anything)
Note: The original SHA-1 value is correct it just won't change.