| Bug? | yes
| SuluArticleBundle Version | 0.7.1
| Sulu Version | 1.6.13
| Elastic Search Version| 6.1.2
Actual Behavior
Throws the following error when running php bin/console ongr:es:index:create
{"error":{"root_cause":[{"type":"mapper_parsing_exception","reason":"No handler for type [string] declared on field [changer_contact_id]"}],"type": "mapper_parsing_exception","reason":"Failed to parse mapping [article]: No handler for type [string] declared on field [changer_contact_id]","cause d_by":{"type":"mapper_parsing_exception","reason":"No handler for type [string] declared on field [changer_contact_id]"}},"status":400}
Expected Behavior
Shouldn't be throwing the error and set correctly the index
Possible Solutions
If you have already ideas how to solve the issue, add them here.
(remove this section if not needed)