A "Maximum trigger depth exceeded" error occurs when a trigger invokes itself recursively, either directly or indirectly, and exceeds the maximum stack depth. To fix this error, you can use a helper class to set a Boolean flag to TRUE the first time a trigger is fired, and then modify the trigger to only fire when the Boolean flag is FALSE. This way, you can prevent the trigger from running more than once for the same record. Splitting the trigger logic into two separate triggers does not solve the problem, as the triggers may still invoke each other recursively. Converting the trigger to use the @future annotation does not guarantee that the error will not occur, as the future method may still invoke the trigger again. The @MultiThread=true annotation does not exist in Apex. Reference: [Trigger Frameworks and Apex Trigger Best Practices], [@future Annotation]