phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1aef5898ca97b9c1af7a73d25f6495ce' 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 ('1aef5898ca97b9c1af7a73d25f6495ce', -1, 1768190874, 1768190874, 'd849d887', -9, 0, 0)

Line : 187
File : sessions.php