fix errors #189

Job	Run time
build-docs	16s
build-polypheny	7m 16s
test-stores (mongodb)	10m 1s
test-stores (cottontail)	10m 2s
test-stores (postgresql)	1m 4s
test-system-python (3.9, macos-latest)	10m 3s
test-system-python (3.10, ubuntu-latest)	48s
test-stores (monetdb)	10m 1s
test-stores (hsqldb)	48s
test-system-python (3.9, windows-latest)	10m 4s
test-system-python (3.10, macos-latest)	10m 4s
test-stores (neo4j)	10m 2s
test-system-python (3.9, ubuntu-latest)	10m 2s
test-system-python (3.13, windows-latest)	10m 3s
test-system-python (3.11, macos-latest)	10m 4s
test-stores (file)	10m 4s
test-system-python (3.13, macos-latest)	1m 4s
test-system-python (3.12, macos-latest)	10m 3s
test-system-python (3.11, windows-latest)	10m 2s
test-system-python (3.13, ubuntu-latest)	10m 2s
test-system-python (3.11, ubuntu-latest)	10m 2s
test-system-python (3.12, windows-latest)	10m 3s
test-system-python (3.10, windows-latest)	10m 4s
test-system-python (3.12, ubuntu-latest)	10m 2s
	3h 12m 4s

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