Some birds breed seasonally. My green wings tend to breed in late spring and late fall. The red-fronted breeding season is generally October to March, but mine seem to breed whenever they want to. Last year we had chicks in late January, then in April, and again in July. This year we didn't get the first babies until June and I limited them to two clutches. The harlequin pair breeds in the late summer but didn't this year, but they still might. Even if they are mating, giving them a place to lay encourages them to continue. Removing their next box, or blocking it off will help end the behavior. They will need time to replenish their resources for the next breeding season. If they breed too much, the eggs could be odd sizes, or the shells may be too thick, too thin, or not fully formed. Fertility will also decline. You might want to discourage them from breeding again this year and force them to have a 6 - 9 month break before they breed again.
My green wing pair is in their early 20s. The harlequins are in their mid-teens. The red-fronted are 8 or 9 years old. We have an old blue and gold at the store and we were told she started breeding at 10 years old and continued for several decades before she stopped. If you manage their breeding and health properly they will have a long productive life. I prefer to have fewer chicks that are better quality than more chicks that may not be as robust. It's also exhausting to be constantly on the go and have my life scheduled around feeding birds. Right now I have 8 baby macaws, 4 baby greys, a baby citron, and the last clutch of conures that are being hand fed each day. I'm exhausted and longing for the house to be quiet again.