Can't save Comments. Comments table missing in BW.

Hi,

Some time back we created a new model. Everything is working fine except for the comments. Following is the error message I get.

Comments are enabled in the Model settings.

This is also causing issues when I try to make any dimension secured. When I save after making and dimension secured, I get the following error:

On running UJA_DATA_CHECKER for the environment, getting the following warnings:

Is it possible to recreate standard tables through BW?

Any help would be appreciated.

Thanks

Regards,

Nishant