why do I have letter i in my footer indesign

[Alexandra22779675iotm]

Hello, I need some help with the footer. It appears a letter "i" in my footer, and I don't know how to get rid of it. It's on every page and it appears in the content too.  

[Willi Adelberger · Accepted solution]

• Did you put in a section marker on your master/parent page?
• When you double click twice on the black triangle above the thumbnail of page 1? Is there something in the section marker.

[Alexandra22779675iotm]

Thank you very much.