I am having a very strange issue with the internal name of a site column. I created the column, added it to a Content Type, then created a list based on that content type.
Somewhere along the way SharePoint decided to give the field in the list a different Internal name than the actual site column. So If I look at the field settings from within the list, the field internal name is given as _x0050_AR612, while if I look a the column settings from the site content type, it is PAR612 (what I originally named it). The GUIDs are the same in either case, so I am sure it is talking about the same column.
This seems to be causing a conflict with the client side web part I am developing. If I try and write a new entry to the list including this field the write fails, no matter which form of the name form I use. Remove that field from the data object and the item gets created without issue.
Anyone else come across this? Ever find a solution? I have already tried destroying the column and re-creating it, but the same thing happens.