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 ('5fe1c526b8cc59c9b69841d9c3cff667', -1, 1475137348, 1475137348, '36e2eeb2', 0, 0, 0)

Line : 172
File : sessions.php