系统错误

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SQL:
SELECT * FROM `ims_product_design_category` WHERE id= and weid=68
Params:
array ( )
SQL Error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and weid=68' at line 1
Traces:
file: /framework/class/db.class.php; line: 137;
file: /framework/function/pdo.func.php; line: 40;
file: /addons/product_design/site.php; line: 818;
file: /app/source/entry/__init.php; line: 38;
file: /app/index.php; line: 88;