phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '20f2b718d691e8391dbf052d0f2bc174' 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 ('20f2b718d691e8391dbf052d0f2bc174', -1, 1775947807, 1775947807, '2d971ed8', 14, 0, 0)

Line : 187
File : sessions.php