phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1c9740a0d7c95277e0794ebe4d79c342' 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 ('1c9740a0d7c95277e0794ebe4d79c342', -1, 1766575494, 1766575494, 'd849d819', -9, 0, 0)

Line : 187
File : sessions.php