Endnotes insert citation with number 1, i have already 80 citations

Hello, I am using Endnote X9, last version and Pages 8.1 in mac Sierra. I have a document in which i already inserted 80 references. Today, I am trying to insert a new within the text and it places number 1! how could i solve my problem? is pages not recognizing my bibliography? is there any way to solve this issue in Pages? i am a bit hopeless at this moment.

Thank you so much