Duplicate key "errorMessage" is uninformative

[maxulysse]

Following a nf-core template update, I had this error:

ERROR ~ Duplicate key "errorMessage" at 989 [character 31 line 22]

The error was indeed on line 22, but the file was assets/schema_input.json

cf nf-core/rnavar#215

(error was fixed by nf-core/rnavar@fd3a561)

[nvnieuwk]

This error message should be improved to point to the file with the issue