The field of the "Source" form has an incorrect format

[NiTika1509]

Summary

When saving or editing the lead again, a field type error error appears

Steps to reproduce

1. Create new lead in page plugin
2. Enter lead data
3. Save new lead
4. Try to change an existing lead

Expected results

1. Create new lead in page plugin
2. Enter lead data
3. Save new lead
4. When editing a lead, the data changes