phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c19c3766b0bad994ba16d1ab68b5bdc2' 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 ('c19c3766b0bad994ba16d1ab68b5bdc2', -1, 1769550623, 1769550623, 'd849d851', -4, 0, 0)

Line : 187
File : sessions.php