ID "MNI2" already defined - wo hackts da?

Hallo,

hab folgendes Problem, was bedeutet das und was muß ich dabei ändern?
PS Bin noch sehr unerfahren, was das betrifft
Will die ganzen Fehler in der Programmierung beseitigen etc.
Hoffe mal die Suma rechnets mir dann gut an.



# Line 12, Column 553: ID "MNI2" already defined.

…in_nav_item" href="Kredite.html" id="mni2" shape="rect">Kredite</a></li><li><

&#9993;

An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).
# Info Line 12, Column 468: ID "MNI2" first defined here.

…main_nav_item" href="index.html" id="mni2" shape="rect">Home</a></li><li><a c


Danke!