Contradiction with Numbers 32:39
This verse states that the children of Machir captured Gilead and dispossessed the Amorites, while 1 Chronicles 2:23 credits Jair with capturing certain towns in Gilead.
Numbers 32:39: And the children of Machir the son of Manasseh went to Gilead, and took it, and dispossessed the Amorite which [was] in it.
Contradiction with Joshua 13:31
This verse assigns the towns of Jair, which are in Bashan (a region associated with Gilead), to the half-tribe of Manasseh, whereas 1 Chronicles 2:23 attributes the land to Jair as an individual conquest among the families of the tribe of Judah.
Joshua 13:31: And half Gilead, and Ashtaroth, and Edrei, cities of the kingdom of Og in Bashan, [were pertaining] unto the children of Machir the son of Manasseh, [even] to the one half of the children of Machir by their families.