This could be just a problem with the database not having the archive list set to a field that is big enough. Normally I just copy/paste the recommended TL suggested field types, which may not always work in all situations. Try to modify the following field.
database.sql=> `gallery_archives` varchar(255) NOT NULL default '',
Code:
--
-- Table `tl_module`
--
CREATE TABLE `tl_module` (
...
`gallery_archives` text NULL,
...
make the change and re-run the install tool to update the database to the new value -- it shouldn't lose any data, and anyway, it will only be for the gallery list module(s) that you've created.
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