phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1620828b0e362d5a74b653ef268d41b8' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1620828b0e362d5a74b653ef268d41b8', -1, 1766199995, 1766199995, 'd849d8d7', -4, 0, 0)

Line : 187
File : sessions.php