Error when filling dataset of called testcase if language is set diferent from English

Description
Error when filling dataset of called Test if language is set different from English

How to reproduce

1. Set profile language to German
2. Create a Test with at least one parameter
3. Create a second Test which calls the first Test
4. Open the dataset dialog for the called step
5. Add the parameter and fill it with anything
6. Save

Actual result/Attachments

Expected result
No error is prompted and the parameter is saved

Version

• 6.0.2