Steps to reproduce:
1) Create Graph widget.
2) Open Data set tab and press on Select near Item field.
3) Try to checkin/uncheck several items.
Result:
Inadequate behavior and console error message.
![](https://support.zabbix.com/secure/thumbnail/170703/_thumb_170703.png)
![](https://support.zabbix.com/secure/thumbnail/170702/_thumb_170702.png)
Expected:
No console errors.
Normali added checkign checkout.