What to do when accidentially ordered an aircraft with different engine?

[qunow]

All my 737/320 are CFM engines.
Then I accidentially picked a 320 with IAE engine on 8-years lease.
Should I just store it or use it till mandatory lease period end?
And can the interface for used aircraft add a column to display engine type...
Mixing different iternations, versions and variants of same engine, e.g. CFM56 together, won't generate additional fixed maint. cost right?
And would it be worth to unify a fleet with both 737/320 to all 320..?

[schro]

Don't panic.

Between those engines there's not a material difference in costs/performance. Incremental commonality costs are basically a rounding error.

The cost of cancelling thr leases and reordering is far more expensive than keeping them.

[JumboShrimp]

You can change engines on orders that are > 1 year away from delivery.

[schro]

You can change engines on orders that are > 1 year away from delivery.

Sure, but doesn't that reprice the whole thing to market and drop all volume discounts?

[JumboShrimp]

Sure, but doesn't that reprice the whole thing to market and drop all volume discounts?

I don't think it does.

I never changed engines, I only changed seating configurations or maybe the destination base, and the charges are relatively small...