diff -r 2837b549e616 -r 94b0a30a1886 src/model.cpp
--- a/src/model.cpp	Wed Jun 22 16:53:35 2022 +0300
+++ b/src/model.cpp	Wed Jun 22 20:10:57 2022 +0300
@@ -203,7 +203,7 @@
 	Q_EMIT this->dataChanged(index, index);
 }
 
-std::optional<int> Model::find(ModelId id) const
+std::optional<std::size_t> Model::find(ModelId id) const
 {
 	return pointerToOptional(findInMap(this->positions, id));
 }