Cannot update List of GAI Workflow at 4 keys; length of assign value list (46) does not match length of the list to update (4)

Question

While executing PM i am getting error how can i resolve ? a!localVariables(
 local!currGrantWorkflow: rule!GAI_getWorkflow(workflowId: ri!workflowId).data,
 local!refDecTree: if(
 rule!SCO_isBoolNotEmptyAndTrue(
 local!currGrantWorkflow['recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{5febe064-3783-49f6-ac2c-1f69ce22e5b5}isCustomWorkflow']
 ),
 null,
 rule!GAI_getRefWorkflowDecisionTree(
 currStatusId: local!currGrantWorkflow['recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{7cd66171-e9d3-45ae-9967-fe88fbd9f594}fkWorkflowTypeStatusId'],
 taskDecisionId: ri!taskDecisionId
 ).data
 ),
 local!customDecTree: if(
 rule!SCO_isBoolBlankOrEmptyOrFalse(
 local!currGrantWorkflow['recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{5febe064-3783-49f6-ac2c-1f69ce22e5b5}isCustomWorkflow']
 ),
 null,
 rule!GAI_getCustomWorkflowDecisionTree(
 currStatusId: local!currGrantWorkflow['recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{7cd66171-e9d3-45ae-9967-fe88fbd9f594}fkWorkflowTypeStatusId'],
 taskDecisionId: ri!taskDecisionId
 )
 ),
 local!nextStatusId: if(
 rule!SCO_isBoolNotEmptyAndTrue(
 local!currGrantWorkflow['recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{5febe064-3783-49f6-ac2c-1f69ce22e5b5}isCustomWorkflow']
 ),
 local!customDecTree['recordType!{a40eed83-2094-46ce-aef5-fca7da4f29e8}GAI Custom Workflow Decision Tree.fields.{29f44dde-1de1-4125-8363-54dcf85519c6}fkNextWorkflowStatusId'],
 local!refDecTree['recordType!{c50c1c2c-8759-4483-9f95-8c12ba42f4be}GAI Ref Workflow Decision Tree.fields.{3bf65603-7f29-486f-b7cf-1a53d94ed2c0}fkNextWorkflowStatusId']
 ),
 local!newGrantWorkflow: if(
 local!nextStatusId = local!currGrantWorkflow['recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{7cd66171-e9d3-45ae-9967-fe88fbd9f594}fkWorkflowTypeStatusId'],
 null,
 if(
 a!isNullOrEmpty(local!nextStatusId),
 local!currGrantWorkflow,
 a!update(
 local!currGrantWorkflow,
 {
 'recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{559ab16f-8958-4603-84a2-f485f5b0651a}assignedTs',
 'recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{7cd66171-e9d3-45ae-9967-fe88fbd9f594}fkWorkflowTypeStatusId',
 'recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{77ff57c7-14f7-4dfc-a103-81afaee4e8d8}updateTs',
 'recordType!{f8c3f153-12d0-4850-97d9-bd6878795255}GAI Workflow.fields.{f007d4d7-7ee0-4736-98f4-c34f3aac3dfb}updateUsr'
 },
 {
 now(),
 local!nextStatusId,
 now(),
 null
 }
 )
 )
 ),
 a!map(
 currGrantWorkflow: local!currGrantWorkflow,
 newGrantWorkflow: local!newGrantWorkflow
 )
) 
 An error occurred while evaluating expression: =rule!GAI_getNextWorkflowStatus( workflowId: pv!workflowId, taskOwner: pv!taskOwner, taskDecisionId: pv!taskDecisionId) (Expression evaluation error in rule 'gai_getnextworkflowstatus' at function a!update [line 36]: Cannot update List of GAI Workflow at 4 keys; length of assign value list (46) does not match length of the list to update (4)) (Data Inputs)

tushark8069 · Answer

From the described error, it is conveyed that local!currGrantWorkflow is a list of type GAI Workflow and has 46 rows in it (local!currGrantWorkflow is holding the 46 copies of recordType GAI Workflow). And you are trying to update the 4 fields into it.
The simple solution would be, if you want to update all the 46 rows then run a forEach() to update the local!currGrantWorkflow as it is holding multiple rows, or specify the index of the local!currGrantWorkflow where you want to update the 4 fields (assignedTs, fkWorkflowTypeStatusId, updateTs, updateUsr)