phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c20382cf73dec6b51c7ecabe3e2a9b33' 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 ('c20382cf73dec6b51c7ecabe3e2a9b33', -1, 1768504936, 1768504936, 'd849d86d', -4, 0, 0)

Line : 187
File : sessions.php