When trying to update using the changed files option 3.1.6 to 3.2.0-a1I am getting a general
error

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General Error
The requested environment production is not available.

BACKTRACE

FILE: (not given by php)
LINE: (not given by php)
CALL: msg_handler()

FILE: [ROOT]/common.php
LINE: 110
CALL: trigger_error()

FILE: [ROOT]/index.php
LINE: 23
CALL: include('[ROOT]/common.php')