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 ('fc927ef2c27e1b5e188258c778e9f8cd', -1, 1524532366, 1524532366, '6b1630f3', 15, 0, 0)

Line : 189
File : sessions.php