"wikiinternallink" is duplicated at every edit in CKeditor

Steps to reproduce:
1. In wiki editor or in CKeditor editor source mode add link like:

[[(% class=" " %)Page>>path:/bin/view/Page]]

2. And Save
3. Edit again in CKeditor and go in source mode

• the wikiinternallink class was added:

   [[(% class="wikiinternallink" %)Page>>path:/bin/view/Page]] 

Expected result:

• the wikiinternallink is generated once

Actual results:

• Edit as many times as you want in CKeditor
• The a "wikiinternallink" will be generated for each edit
• After edited 6 times:

   [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)Page>>path:/bin/view/Page]]