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 ('1fadb1c9b1c43e24eedf31eb91bc9e7e', -1, 1519034763, 1519034763, '365a773b', -2, 0, 0)

Line : 187
File : sessions.php