format Chicago 16th - coma in the name of the journal article

Hello everyone,

I need some help… I am using Chicago 16th Ed. for my writing. But I do not understand why I have a coma at the end of the title of an article while I did not write it while including it in the endnote database.

See: Helen Quane, “The Significance of an Evolving Relationship: ASEAN States and the Global Human Rights Mechanisms,Human Rights Law Review 15 (2015).

Thank you in advance for your help.