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 ('19578b6c4dca4f10b16cb2dd43bf06db', -1, 1519176909, 1519176909, '36dd11ea', 17, 0, 0)

Line : 187
File : sessions.php