Incorrect version validation error when uploading new plugin versions

Code validation errors

    Important In your version.php you have specified $plugin->requires = 2018051703, which corresponds to Moodle 3.6 and will not install on Moodle 3.5 that you chose in the form

My plugin requires Moodle 3.5.3 (see https://docs.moodle.org/dev/Releases#Moodle_3.5_.28LTS.29 for 2018051703 version number) - until recently I was able to select 3.5 as a supported version of the plugin in the plugins DB. Now I am erroneously told that my plugin declares support for 3.6 as a minimum

This thread from rdebleu seems related: https://moodle.org/mod/forum/discuss.php?d=423194