V9 Update column cache hint PHP has encountered a Stack overflow workaround

Reason:

The customer did not update the column cache when they removed some columns or added columns.
Causes the V9_category table to have the original rubbish information, the superfluous form.

Workaround:
The error message is modified by phpMyAdmin to find the entry for the column table error.

Specific steps:

1, first this problem is out on the database table, so the login space phpMyAdmin to manage the database table

2. Execute SQL statement: SELECT * from ' v9_category ' WHERE catid=parentid (note that v9_ is a table prefix and remember to modify it to its own table prefix)

3, under normal circumstances this search is not the record of the query, if the query to record, indicating that the record has a problem

4, the solution put: the value of ParentID modified to the corresponding parent column ID, if it is a level column, that is 0

V9 Update column cache hint PHP has encountered a Stack overflow workaround