phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ebf4c73dfabe0b3a685478f17e86cd1a' 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 ('ebf4c73dfabe0b3a685478f17e86cd1a', -1, 1771013540, 1771013540, 'd849d88a', -4, 0, 0)

Line : 187
File : sessions.php