Error during installation: Data too long for column 'delta' at row 1

I'm getting a big long error (see screenshot) during install that comes down to a SQL error:

SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'delta' at row 1

This is due to block deltas in drupalladder_install: the delta column has a max length of 32 characters, so deltas like drualladder_get_involved_contribute fail because they;re too long (35 characters, in this example).

This might be why the learn_contribute module was renamed to join, but these deltas weren't updated in drupalladder.install.