Product Hierarchy Creation Error in OVSV

Hello All Experts,

I am trying to create product hierarchy in OVSV and I am getting below error which is very common I have seen in forums.

I tried following suggestion by @Jürgen L in below link https://scn.sap.com/thread/1132968

but thats also seems not working.

I have Product Hierarchy as below -

B001 - Vehicle Type

B001-001 - 001 is Eng Type

B001001002 - 002 is Vehicle Color

B001 go successfully saved and I can see 1 in Level No.

Now while maintaining B001001 I am getting below error -

B001 is already created now why still system is not accepting B001001 next entry ? Have I missed anything ?

Experts please guide on this.

Regards,

Sharvari Joshi.