Frame-Relay Subinterface 'cannot change link type' (part 2)

I want to corection last posting about Frame-Relay Subinterface 'cannot change link type'. Last posting I mention about solution 'Now to solve this problem make default configuration subinterface, do write memory and reload the router'. The solution to this problem should be :
- make disable subinterface with 'no interface s1/0.1'
- do 'write memory' save configuration to startup-config
- reload router

R1#sh run int s1/0.1
Building configuration...
Current configuration : 114 bytes
!
interface Serial1/0.1 multipoint
ip address 10.0.0.1 255.0.0.0
frame-relay map ip 10.0.0.2 102 broadcast
end

R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#do sh ip int b
Interface IP-Address OK? Method Status Protocol
Serial1/0 unassigned YES NVRAM up up
Serial1/0.1 10.0.0.1 YES NVRAM up up
R1(config)#no int s1/0.1
Not all config may be removed and may reappear after reactivating the sub-interface

R1(config)#do sh ip int b
Interface IP-Address OK? Method Status Protocol
Serial1/0 unassigned YES NVRAM up up
Serial1/0.1 unassigned YES NVRAM deleted down
R1(config)#int s1/0.1 point-to-point
% Warning: cannot change link type