Method for enhancing the generation of a backup copy of data items (D1, D2, D3) of a distributed data structure, wherein the data items (D1, D2, D3) are stored on a number of network nodes (1, 2, 3, 4, 5, 6) of a computer network, wherein the number of network nodes (1, 2, 3, 4, 5, 6) include a first and a second network node (3, 4), wherein the data items (D1, D2, D3) include a data item and a further data item, wherein the data item and the further data item are interrelated, wherein the data item is stored on the first network node, wherein the further data item is stored on the second network node, wherein the method comprises the steps of: -- performing, by the computer network, a first transaction step, wherein the data item of the first network node is updated such that a first data item (D1') is generated, wherein the further data item of the second network node is updated such that a further first data item (D2') is generated, wherein a first transaction identifier is stored on the first and second network node (3, 4), wherein the first transaction identifier is related to an identification of the first transaction step, -- performing, by the computer network, a second transaction step, wherein the further first data item (D2') of the second network node is updated such that a further second data item (D2") is generated, wherein a second transaction identifier is stored on the second network node, wherein the second transaction identifier is related to an identification of the second transaction step, -- performing, by the computer network, a backup step, wherein a backup copy (B1') of the first data item is generated on the first network node, wherein a further backup copy (B2") of the further second data item (D2") is generated on the second network node, -- performing, by the computer network, a consistency step such that data consistency is realized between the backup copy (B1') and the further backup copy (B2") in dependence of the first and second transaction identifier. -- performing, by the computer network, a first transaction step, wherein the data item of the first network node is updated such that a first data item (D1') is generated, wherein the further data item of the second network node is updated such that a further first data item (D2') is generated, wherein a first transaction identifier is stored on the first and second network node (3, 4), wherein the first transaction identifier is related to an identification of the first transaction step, -- performing, by the computer network, a second transaction step, wherein the further first data item (D2') of the second network node is updated such that a further second data item (D2") is generated, wherein a second transaction identifier is stored on the second network node, wherein the second transaction identifier is related to an identification of the second transaction step, -- performing, by the computer network, a backup step, wherein a backup copy (B1') of the first data item is generated on the first network node, wherein a further backup copy (B2") of the further second data item (D2") is generated on the second network node, -- performing, by the computer network, a consistency step such that data consistency is realized between the backup copy (B1') and the further backup copy (B2") in dependence of the first and second transaction identifier.