Solution : https://service.sap.com/sap/support/notes/1053926 (SAP Service marketplace login required)
Key words : 
sap marketplace______________________________________________________________________enhp2 stack #    enhp2 sp #         avail, ea-hr 602 sp 25 includes wage types, sap marketplaceea-hr hrsp 08             hrsp 29, sap marketplaceea-hr hrsp 09             hrsp 30, sap marketplaceea-hr hrsp 10             hrsp 31, sap marketplaceea-hr hrsp 11             hrsp 32, sap marketplaceea-hr hrsp 12             hrsp 33, sap marketplaceea-hr hrsp 13             hrsp 34, sap marketplaceea-hr hrsp 14             hrsp 35, sap marketplaceea-hr hrsp 15             hrsp 36
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