Unable to delete sub task created or change the sub task to other option (Story)

Question

Hi,

We are facing the problem with following.

1) Getting error when we tried to delete the sub task.

com.atlassian.greenhopper.manager.lexorank.LexoRankIntegrityException: Expected exactly 2 rows; the maximum marker row and the lowest ranked row for rank field[id=10005]

com.atlassian.greenhopper.manager.lexorank.LexoRankIntegrityException: Expected exactly 2 rows; the maximum marker row and the lowest ranked row for rank field[id=10005]
	at com.atlassian.greenhopper.manager.lexorank.LexoRankDaoImpl.getMaximumMarkerRowAndPreviousRow(LexoRankDaoImpl.java:399) [?:?]
	at com.atlassian.greenhopper.service.lexorank.LexoRankOperation.rankInitially(LexoRankOperation.java:180) [?:?]
	at com.atlassian.greenhopper.service.lexorank.LexoRankOperation.execute(LexoRankOperation.java:119) [?:?]
	at com.atlassian.greenhopper.manager.lexorank.LexoRankManagerImpl.performRankOperation(LexoRankManagerImpl.java:300) [?:?]
	at com.atlassian.greenhopper.manager.lexorank.LexoRankManagerImpl.getRankOrRankInitially(LexoRankManagerImpl.java:86) [?:?]
	at com.atlassian.greenhopper.customfield.lexorank.L

2) Getting error when we tried to change the sub task to story. [Converting issue]

Sorry, we had some technical problems during your last operation.

Nic Brough -Adaptavist- · Answer

This is usually caused by bugs or dodgy data in upgrades.

Work through https://confluence.atlassian.com/jirakb/cannot-reindex-jira-due-to-expected-exactly-2-rows-the-maximum-marker-row-and-the-lowest-ranked-row-for-rank-field-779158916.html to fix it.