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java.lang.IllegalArgumentException: duplicate key: Attachment at com.google.common.base.Preconditions.checkArgument(Preconditions.java:115) at com.google.common.collect.RegularImmutableMap.<init>(RegularImmutableMap.java:72) at com.google.common.collect.ImmutableMap$Builder.fromEntryList(ImmutableMap.java:221) at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:207) at com.atlassian.labs.remoteapps.product.jira.webhook.IssueEventMapper.changeGroupToMap(IssueEventMapper.java:78) at com.atlassian.labs.remoteapps.product.jira.webhook.IssueEventMapper.toMap(IssueEventMapper.java:40) at com.atlassian.labs.remoteapps.product.jira.webhook.IssueEventMapper.toMap(IssueEventMapper.java:16) at com.atlassian.labs.remoteapps.product.jira.webhook.JiraEventSerializerFactory.create(JiraEventSerializerFactory.java:41)