Bismika Alllahuma

In Mark 6: 8-9, we are told that Jesus commanded his disciples not to bring anything for their journey except for a staff:

And commanded them that they should take nothing for their journey, save a staff only; no scrip, no bread, no money in their purse: But be shod with sandals; and not put on two coats.

Yet in Matthew 10: 9-10, we are told that in the very same account of the preparation for their journey Jesus did not allow anything, not even a staff, to be brought:

Provide neither gold, nor silver, nor brass in your purses, Nor scrip for your journey, neither two coats, neither shoes, nor yet staves: for the workman is worthy of his meat.

Matthew says that Jesus did not allow his diciples to take staves, but Mark says the he allowed them to take staves. Hence, we wonder how Christians will harmonize these two contrasting accounts with their brand of hermeutics.