I keep getting this error message emailed to me concerning a process in the Process Builder:

An error occurred at element myRule_1_A1 (FlowRecordUpdate).
UNKNOWN_EXCEPTION: An unexpected error occurred. Please include this ErrorId if you contact support: 737425792-70440 (-548403183) This report lists the elements that the flow interview executed. The report is a beta feature.
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Flow Details
Flow Name: Lead_Response_Business_Hours
Type: Workflow
Version: 1
Status: Active
Flow Interview Details
Interview Label:
Current User: SF Admin (00580000003XSTK)
Start time: 2/17/2016 11:54 AM
Duration: 0 seconds
How the Interview Started
SF Admin (00580000003XSTK) started the flow interview.
Some of this flow's variables were set when the interview started.
myVariable_old = 00Q1A00001YBrunUAD
myVariable_current = 00Q1A00001YBrunUAD
ASSIGNMENT: myVariable_waitStartTimeAssignment
{!myVariable_waitStartTimeVariable} Equals {!Flow.CurrentDateTime}
Result
{!myVariable_waitStartTimeVariable} = "2/17/2016 11:54 AM"
DECISION: myDecision
Executed this outcome: myRule_1
Outcome conditions: 1 OR 2
1. {!myVariable_current.Status} (Hide Report) Does not equal Open
2. {!myVariable_current.IsConverted} (false) Equals true
Logic: Advanced Logic (1 OR 2)
RECORD UPDATE: myRule_1_A1
Find all Lead records where:
Process_Builder_Test__c Equals {!formula_2_myRule_1_A1_Process_Builder_Test_c} (9/29/2015 2:05 PM)
Id Equals {!myVariable_current.Id} (00Q1A00001YBrunUAD)
Update the records’ field values.
Status_Changed_with_Bus_Hours__c = {!formula_3_myRule_1_A1_Status_Changed_with_Bus_Hours_c} (2/17/2016 11:54 AM)
Result
Failed to update records that meet the filter criteria.


Can anyone help me figure this out?