remove restriction of BON_STORNO for dsfinv-k

doc/appendix-de-kassensichv/reference-tables/reference-tables.md

@@ -446,7 +446,7 @@ Each subitem as described in the table below:
 | `BON_TYP` | Receipt type / action type| String (30) | Deducted from `ftReceiptCase` |
 | `BON_NAME` | Additional description related to the `BON_TYP` | String (60) | Mandatory if `BON_TYPE` is "AVSonstige", otherwise optional, can be sent via `ftReceiptCaseData` in JSON format. To send, add the key value pair `ReceiptName ` e.g. `"ftReceiptCaseData":"{ ..., "ReceiptName":"Sonstige Sonderwurst", ... }"` |
 | `TERMINAL_ID` | Mandatory, ID of the terminal that was used to record this receipt | String (50) | `cbTerminalID` |
-| `BON_STORNO` | Cancellation indicator | String | Filled by ft. Mandatory: if the receipt is a reverse/voided receipt, then it must be marked with the `ftReceiptCaseFlag` `0x0000000000040000` and must reference the initial receipt via `cbPreviousReceiptReference`. The referenced initial receipt must be part of the current cashpoint closing.|
+| `BON_STORNO` | Cancellation indicator | String | Filled by ft. Mandatory: if the receipt is a reverse/voided receipt, then it must be marked with the `ftReceiptCaseFlag` `0x0000000000040000` and has to reference the initial receipt via `cbPreviousReceiptReference`. |
 | `BON_START` | Time of the action start | ISO 8601 and RFC3339 date | The action start can be within this cashpoint or outside of this cashpoint. If outside (e.g. by another system or another cashpoint) than it has to be provided in via `ftReceiptCaseData` in JSON format by adding the key value pair `ActionStartMoment`. E.g. `"ftReceiptCaseData":"{ ..., "ActionStartMoment":"2020-09-27T17:00:01", ... }"`. If not provided, ft tries to find the action start by following the `cbPreviousReceiptReference` path into the past until no more previous receipt references exist. ft will than fill this field with the value from `cbReceiptMoment` of the oldest receipt found in that chain. |
 | `BON_ENDE` | Time of the action end | String | `cbReceiptMoment` |
 | `BEDIENER_ID` | User-ID | String (50) | Mandatory, send via `cbUser` in JSON format by adding the key value pair `UserId` e.g. `"cbUser":"{ "UserId":"19292", "UserName":"Peter Lux"}"`|