Cabal is unhelpful when updating `.cabal` version

[hasufell]

$ cabal check
Warning: libarchive-clib.cabal:6:33:
unexpected Unknown SPDX license identifier: 'OtherLicense' SPDX license list
contains plenty of licenses. See https://spdx.org/licenses/. Also they can be
combined into complex expressions with AND and OR.
Errors encountered when parsing cabal file libarchive-clib.cabal:

libarchive-clib.cabal:6:33: error:
unexpected Unknown SPDX license identifier: 'OtherLicense' SPDX license list contains plenty of licenses. See https://spdx.org/licenses/. Also they can be combined into complex expressions with AND and OR.

    5 | version:            3.8.8
    6 | license:            OtherLicense
      |                                 ^
Error: [Cabal-7035]
parse error

Cabal should tell me what the new identifier for OtherLicense is, instead of bothering me with SPDX licenses and being secretive about what to do.