Email template Token object is empty

Hi,

    I use an object called obj1 for an email template from past 6 months this template i.e template 1 was working fine. Recently for one enhancement we added an association on the obj1 thats it. I used the same obj1 for new template called template2.

After refreshing the MxModel reflection , since template1 already existing I could see the the token object empty (see the pic below)

Could you please let me know wats the issue is?

Thanks,

Swathi S