SAP Message UMG413 - Transaction SPUMG is currently locked. Return code: &1

Diagnosis You called transaction SPUMG but a status check found that SPUMG cannotbe executed due to Upgrade activities. ·,,Return code 5: Shadow instance is running ·,,Return code 6: Upgrade reached phase EU_IMP Procedure Execution of SPUMG will be released again after Upgrade activities arecompleted.