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 ('51b441d9a1c25fc7eb7570bc0002c8dd', -1, 1519416847, 1519416847, '36a74b1c', 6, 0, 0)

Line : 187
File : sessions.php