Hello/Hi/Greetings,

Doing some mainteneance, I found a bunch of old empty albums, but they are undeletable directly from admin.php
Could probably delete from SQL directly, but ... just in case would like to figure it out, what might be wrong with them, fix it, and delete from admin.php. CSV export is such.:

"id","name","id_uppercat","comment","dir","rank","status","site_id","visible","representative_picture_id","uppercats","commentable","global_rank","image_order","permalink","lastmodified","polaroid_active"
"12314","hdgfhygh",NULL,NULL,"hdgfhygh","4143","public","1","true",NULL,"12314","true","4143",NULL,NULL,"2021-05-11 15:34:29","false"
"14451","hdgfhygh",NULL,NULL,"hdgfhygh","4159","public","1","true",NULL,"14451","true","4159",NULL,NULL,"2021-05-11 15:34:29","false"
"16588","hdgfhygh",NULL,NULL,"hdgfhygh","4175","public","1","true",NULL,"16588","true","4175",NULL,NULL,"2021-05-11 15:34:29","false"
"18725","hdgfhygh",NULL,NULL,"hdgfhygh","4191","public","1","true",NULL,"18725","true","4191",NULL,NULL,"2021-05-11 15:34:29","false"

Can't detect anything wrong there either...
Btw also the [Administration > Tools > Maintenance] options doesn't seem to fix this undeletable issue.
Any hints, what might be wrong and causes them to be this way?

(Copy here your environment details, found on your Piwigo page [Administration > Tools > Maintenance])

    Piwigo 11.4.0 Check for upgrade
    Operating system: Linux
    PHP: 7.1.33-3+0~20191218.29+debian9~1.gbp18b07c (Show info) [2021-05-11 17:01:01]
    MySQL: 5.5.5-10.1.48-MariaDB-1~stretch [2021-05-11 17:01:01]
    Graphics Library: External ImageMagick 6.9.7-4