Unknown Metaschema validation error after enricher update

For engineers Enrichment
1

After updating collector/enricher recently I started receiving validation errors:

[{"path":"$","message":"Unknown Metaschema: http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0"}]}},{"schemaKey":"iglu:com.stacktome/content_impression/jsonschema/1-0-0","error":{"error":"ValidationError","schemaIssues":[{"path":"$","message":"Unknown Metaschema: http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0"}]}}

when iglu schema as follows:

{
    "$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0",
    "description": "Schema for content impression context",
    "self":
    {
        "vendor": "com.stacktome",
        "name": "content_impression",
        "format": "jsonschema",
        "version": "1-0-0"
    },
    "type": "object",
    "properties":
    {
        "contentId": {"type":["string"],"maxLength":255},
        "contentType": {"type":["string"],"maxLength":255},
        "contentObjectType": {"type":["string"],"maxLength":255},
        "contentSource": {"type":["string"],"maxLength":255},
        "contentLanguage": {"type":["string"],"maxLength":255},
        "contentTitle": {"type":["string"],"maxLength":255},
        "contentRating": {"type":"integer","maxLength":255},
        "contentScore": {"type":"number"},
        "containerType": {"type":["string"],"maxLength":255},
        "publishedTimestamp": {"type":["string"],"format":"date-time"},
        "position": {"type":"integer"}
    },
    "minProperties": 1,
    "additionalProperties": false
}

it’s quite strange cause all custom schemas we use have same $schema definition; I tried adding # at the end but didn’t help. The only thing that’s different about this, is that there are higher version schemas 1-0-1,2,3,4 - I couldn’t delete them yet but not sure if that would be causing the validation issue, but it seems the only thing that I can think of that’s different now.

I guess somewhat related to: Enriched Bad event - Failure cause