Apache-1.0+ not recognized as a valid license

[vargenau]

apacheplus.spdx.json

pyspdxtools -i apacheplus.spdx.json
ERROR:root:The document is invalid. The following issues have been found:
Unrecognized license reference: Apache-1.0+. license_expression must only use IDs from the license list or extracted licensing info, but is: Apache-1.0+
Unrecognized license reference: Apache-1.0+. license_expression must only use IDs from the license list or extracted licensing info, but is: Apache-1.0+

tools-java correctly say that the SBOM is valid SPDX.