1.

Is Blocking Key assigned to material master in basic data 1 view in  X plant material status, if yes, remove blocking key and create PR & PO. Or check  source list(ME01) is  material blocked for procurement, if yes, remove it and save .Now  go for creation of PR & PO of material.

The blocking keys(01-Block for procurement" and "BP-Block for purchasing), as you have, the

code and description may be different but  properties are same and both are cause for same purpose which is not allowing you to creates PR & PO as procurement and purchasing both looks very much similar word as designed by your consultant!

You can find out both keys ( 01 and BP) details in following path , where Purchasing segment set  B in field of. Purchasing msg. 

SPRO > Logistics -General > Material Master > Settings for Key Fields > Define Material Statuses

Now as needed/required by you remove the Blocking Key 01 or BP  and try to create PR & PO! So you are able to create PR & PO

X-Plant status - Meaning of that number

01 - Obsolete

03 - Hibernate/standby

05 - Discontinue

10 - Concept

11 - Pending production

15 - Engineering model

20 - prototype

30 - o-series

40 - serial production

45 - project production

50 - specila production

55 - phase out

Cross-plant material status in Material Master (Basic data 1)