MySQL Error!

The Error returned was:
Incorrect key file for table '/tmp2/#sql_7df7_38.MYI'; try to repair it

Error Number:

Warning: Unknown: open(/home/u021571/xn--d1akcekdb2f5ai.xn--p1ai/tmp/sess_343b805667f804c8da121c8e178e66a5, O_RDWR) failed: Отказано в доступе (13) in Unknown on line 0 Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/home/u021571/xn--d1akcekdb2f5ai.xn--p1ai/tmp) in Unknown on line 0