phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1814ac9ede58b36a1b4a6b2ba671eb01' 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 ('1814ac9ede58b36a1b4a6b2ba671eb01', -1, 1771823118, 1771823118, '2d971ed8', -9, 0, 0)

Line : 187
File : sessions.php