Error occurred when JIRA tried to send an email

Error occurred:

An error occurred whilst rendering this message. Please contact the
administrators, and inform them of this bug.

Details:
-------
org.apache.velocity.exception.MethodInvocationException: Invocation of
method 'printChangelog' in class com.atlassian.jira.util.JiraVelocityHelper
threw exception class
com.atlassian.jira.issue.customfields.impl.FieldValidationException :
Invalid resolution name 'Change order required'.
at
org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:246
)
at
org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.ja
va:175)
at
org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.jav
a:220)
at
org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55)
at
org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement
.java:70)
at
org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:23
0)
at
org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroPro
xy.java:172)
at
org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.jav
a:114)
at
org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:23
0)
at
org.apache.velocity.app.VelocityEngine.evaluate(VelocityEngine.java:316)
at
org.apache.velocity.app.VelocityEngine.evaluate(VelocityEngine.java:210)
at
com.atlassian.velocity.DefaultVelocityManager.getEncodedBodyForContent(Defau
ltVelocityManager.java:142)
at
com.atlassian.jira.mail.MailingListCompiler.addMailsToQueue(MailingListCompi
ler.java:207)
at
com.atlassian.jira.mail.MailingListCompiler.access$200(MailingListCompiler.j
ava:34)
at
com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.addEmailsTo
Queue(MailingListCompiler.java:372)
at
com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendLists(M
ailingListCompiler.java:351)
at
com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendNoLevel
sIgnoreGroup(MailingListCompiler.java:332)
at
com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendToAll(M
ailingListCompiler.java:327)
at
com.atlassian.jira.mail.MailingListCompiler.sendLists(MailingListCompiler.ja
va:104)
at
com.atlassian.jira.mail.IssueMailQueueItem.send(IssueMailQueueItem.java:167)
at
com.atlassian.mail.queue.MailQueueImpl.sendBuffer(MailQueueImpl.java:68)
at
com.atlassian.jira.service.services.mail.MailQueueService.run(MailQueueServi
ce.java:23)
at
com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainer
Impl.java:67)
at
com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:48)
at org.quartz.core.JobRunShell.run(JobRunShell.java:191)
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516
)