SQL Foreign Key Constraint Error 1025 (152)

I keep getting an error every time i try to drop a table called "countires" and a field called "countries".

#1025 - Error on rename of '.\mutli_page_form\survey'
to '.\mutli_page_form\#sql2-820-1fb' (开发者_运维问答errno: 152)

It says there is a FK dependency on the table "survey" i have tried multiple times to delete it to no success.

#1217 - Cannot delete or update a parent row: a foreign key constraint fails

I now get this error once trying to delete the table of Countries

The database has been told to ensure data integrity. This is what you're seeing. There is survey data that references a country. If you delete the country table then the survey data won't have valid countries associated with it. You'll have to remove the surveys first before you can remove the countries.

You must set index both for id ()'s in 2 tables -> after try again