Hey Nibal, Jesse with the Land F/X irrigation team here. Thanks for reaching out about that. I'll start a ticket for you so you can send your files. We will need the files to look into this for you. I'll make sure we summarize the ticket back on this post.

Hi Nibal,
Cole here with Land F/X. When we looked at your files, it appeared that the Valve Schedule block in the drawing was incorrectly defined. This could have happened by copying a Valve Schedule from another drawing, accidentally changing the title text vertex location, or something else of the sort. To resolve this, delete the valve schedule(s) from your drawing, type the command PRG, and hit enter. After this, you will be able to place a correct Valve Schedule. Let us know if you have any further questions.