phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8b16c55a7ac88ea1a6e897dd6741a4f2' 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 ('8b16c55a7ac88ea1a6e897dd6741a4f2', -1, 1770057989, 1770057989, 'd849d817', -4, 0, 0)

Line : 187
File : sessions.php