The assertion to test the version update (PATCH request) is incorrectly setting the timestamp in the updated version data as a Unix timestamp instead of a date string that can be parsed by strtotime().

Depending on the current time, the timestamp is sometimes converted by the strtotime() call in VersionUpdateCommand to a date that is not supported by the database, which causes the SQL UPDATE statement in version_update() to fail.

For example:

$t = 1701451181;
echo strtotime(); // -24869487495
print_r(date_parse($t));

Array
(
    [year] => 1181
    [month] => 
    [day] => 
    [hour] => 17
    [minute] => 1
    [second] => 45
    [fraction] => 0
    [warning_count] => 0
    [warnings] => Array
        (
        )

    [error_count] => 0
    [errors] => Array
        (
        )

    [is_localtime] => 
)

Incorrect logic in test case was introduced by commit MantisBT master 5caafd27 (see 0030415).