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 ('1c78b4c8d3f99fff7a3d1c1fc1f2a282', -1, 1462278258, 1462278258, '1716c806', -1, 0, 0)

Line : 187
File : sessions.php