phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('8855cc7a78efd46ee335d01944fa514c', -1, 1462021539, 1462021539, '36f2e7d2', -1, 0, 0)

Line : 187
File : sessions.php