Toli Sous le Manguier

I do not know about Njie Mfifen Mounpain Ousseini but when I checked, this season 2017/2018 he is listed as a defender at his club Skopje FC not Vadar Skopje FC.
Played 18 match with 1 goal thsi season.
How can we replace a forward with a defender?

First name
Ousseini Nji Nfifen
Last name
Mounpain
Nationality
Cameroon
Date of birth
20 January 1994
Age
24
Country of birth
Cameroon
Place of birth
Yaoundé
Position
Defender
Height
186 cm
Weight
78 kg
Foot
Right