Here is a Morin Khuur instrument (2 string fiddle) from Mongolia.
When I took a look at the soft wood peg there was a small lip that did not allow the peg to go into the peg box. I adjusted that and the peg worked as expected. Even with the peg working correctly, you could not tune it up to pitch. Since Irina had an extra set of strings, I suggested that she remove a couple strans of the string and try tuning again. Then repeat the process until the string can get tuned up to pitch and that it sounds good.
In the end, she removed 80 and 40 strands from right and left string, bringing down the strand count to 135 and 160 which matched the strand count of her spare set of strings.