fix: check for latest transaction of the same company only (#38)

Co-authored-by: Raffael Meyer <14891507+barredterra@users.noreply.github.com>

erpnext_germany/custom/sales.py

@@ -7,7 +7,7 @@ def on_trash(doc: SellingController, event: str = None) -> None:
 	if doc.flags.ignore_validate:
 		return
 
-	if is_not_latest(doc.doctype, doc.name, doc.creation):
+	if is_not_latest(doc.doctype, doc.name, doc.creation, doc.company):
 		frappe.throw(
 			msg=_(
 				"Only the most recent {0} can be deleted in order to avoid gaps in numbering."
@@ -16,11 +16,12 @@ def on_trash(doc: SellingController, event: str = None) -> None:
 		)
 
 
-def is_not_latest(doctype, name, creation):
+def is_not_latest(doctype, name, creation, company):
 	return frappe.db.exists(
 		doctype,
 		{
 			"creation": (">", creation),
 			"name": ("!=", name),
+			"company": company,
 		},
 	)