An information processing apparatus permits editing of information held by an existing node in a version control graph that contains a plurality of nodes, each of which is assigned an identifier corresponding to information held by the node. The information processing apparatus detects, upon merging a first branch and a second branch contained in the version control graph, a previous merged data set that is generated from a data set of a first version referred to by a node of the first branch and a data set of a second version referred to by a node of the second branch, on the basis of history information. The information processing apparatus generates a new merged data set by merging the first branch and the second branch, using the detected merged data set.