https://bugs.kde.org/show_bug.cgi?id=429963
--- Comment #3 from Maik Qualmann <metzping...@gmail.com> --- I think the best solution is to delete all tables from the thumbnail DB. DigiKam will recreate the tables at the next start and create new thumbnails. First start digiKam so that the internal MySQL server runs. Now start HeidiSQL. Connect to the server, localhost, port 3307, username "root", no password. Database is "digikam". In HeidiSQL there is the possibility to execute SQL code. Copy line by line and execute them: DROP TABLE IF EXISTS ThumbSettings; DROP TABLE IF EXISTS CustomIdentifiers; DROP TABLE IF EXISTS FilePaths; DROP TABLE IF EXISTS UniqueHashes; DROP TABLE IF EXISTS Thumbnails; Quit HeidiSQL and digiKam. Please check your hard drive on which the database is located, a defective hard drive could also cause the problem. Maik -- You are receiving this mail because: You are watching all bug changes.