phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'dcb0ec188a9d87fb806e79e3db04752e' 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 ('dcb0ec188a9d87fb806e79e3db04752e', -1, 1770579576, 1770579576, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php