(1054, "Unknown column 'tabItem Category.item_class' in 'where clause'")

ERPNext
#1

ERPNext: v13.0.0-beta.3 (develop-13)

Frappe Framework: v13.0.0-beta.3 (version-13)

pymysql.err.InternalError: (1054, “Unknown column ‘tabItem Category.item_class’ in ‘where clause’”)