500 error thrown if script is uploaded that already exists

If you upload a script using a name of an existing script an 500 error response is returned, and a scary looking stack trace is logged.

Expected: Uploading a script using a name that already exist should return a 409 (conflict) response code, and a message indicating what the problem is.

2019-02-06 09:52:01,732-0600 WARN [qtp1878281728-67] admin org.sonatype.nexus.siesta.internal.UnexpectedExceptionMapper - (ID 1c90c56c-bdae-41c1-8a7f-b4f5a5b0c821) Unexpected exception: com.orientechnologies.orient.core.storage.ORecordDuplicatedException: Cannot index record #86:0: found duplicated key 'helloWorld' in index 'script_name_idx' previously assigned to the record #85:0
DB name="config" INDEX=script_name_idx RID=#85:0
com.orientechnologies.orient.core.storage.ORecordDuplicatedException: Cannot index record #86:0: found duplicated key 'helloWorld' in index 'script_name_idx' previously assigned to the record #85:0
DB name="config"
at com.orientechnologies.orient.core.index.OIndexUnique$1.validate(OIndexUnique.java:47)
at com.orientechnologies.orient.core.index.OIndexUnique$1.validate(OIndexUnique.java:37)
at com.orientechnologies.orient.core.index.sbtree.local.OSBTree.put(OSBTree.java:855)
at com.orientechnologies.orient.core.index.sbtree.local.OSBTree.validatedPut(OSBTree.java:261)
at com.orientechnologies.orient.core.index.engine.OSBTreeIndexEngine.validatedPut(OSBTreeIndexEngine.java:169)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.doValidatedPutIndexValue(OAbstractPaginatedStorage.java:2519)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.validatedPutIndexValue(OAbstractPaginatedStorage.java:2488)
at com.orientechnologies.orient.core.index.OIndexUnique.put(OIndexUnique.java:82)
at com.orientechnologies.orient.core.index.OIndexUnique.put(OIndexUnique.java:35)
at com.orientechnologies.orient.core.index.OIndexAbstract.putInSnapshot(OIndexAbstract.java:956)
at com.orientechnologies.orient.core.index.OIndexAbstract.applyIndexTxEntry(OIndexAbstract.java:790)
at com.orientechnologies.orient.core.index.OIndexAbstract.addTxOperation(OIndexAbstract.java:762)