raspberry pico remapping uart ?

[trix]

hello,

i have a raspberry pico where is 2x a UART on board,.....but i need 3 UART's.
1 - is for the touchscreen (nextion)
2 - is for a home made scanner
3 - for sending data to the PC (laptop).

number 2 & 3 are never working on the same time, the come always after eachother.
so I thought maybe I can remap that:
2 - (home made scanner) on GP 4 & 5
3 - (data to PC) on GP 8 & 9

is ther a way to do this ?
I have already tried:

while True:
	uart = UART (1, baudrate=9600, tx=Pin(4), rx=Pin(5))
	# do some things
	uart.deinit()

	# do some other things

	uart = UART (1, baudrate=9600, tx=Pin(8), rx=Pin(9))
	# do some things
	uart.deinit()

but that was not working.

i read somewhere that somebody thit this to "trow away" de UART en then create a new one.
but he not said: how to "trow away" the UART
maybe somebody now how to do this ?
thanks in advance.