A method performed by a wireless device in a wireless communication system, the method comprising: receiving (S1201), from a network, primary secondary cell, PSCell, mobility commands including a first PSCell mobility command, wherein each of the PSCell mobility commands is related to a corresponding index, and comprises a PSCell mobility condition and a random access preamble for a corresponding target PSCell; storing a list of the PSCell mobility commands; receiving (S1203), from the network, a second PSCell mobility command related to an index; updating (S1205) the list of the PSCell mobility commands based on the index related to the second PSCell mobility command; identifying (S1207), in the updated list, a PSCell mobility command in which a PSCell mobility condition is satisfied; and performing a PSCell mobility based on the identified PSCell mobility command, wherein the updating of the list of the PSCell mobility commands comprises: based on that the index related to the second PSCell mobility command matches an index related to the first PSCell mobility command, replacing at least one parameter value in the first PSCell mobility command with that in the second PSCell mobility command; and based on that the index related to the second PSCell mobility command does not match an index related to any PSCell mobility command in the list, adding the second PSCell mobility command to the list. receiving (S1201), from a network, primary secondary cell, PSCell, mobility commands including a first PSCell mobility command, wherein each of the PSCell mobility commands is related to a corresponding index, and comprises a PSCell mobility condition and a random access preamble for a corresponding target PSCell; storing a list of the PSCell mobility commands; receiving (S1203), from the network, a second PSCell mobility command related to an index; updating (S1205) the list of the PSCell mobility commands based on the index related to the second PSCell mobility command; identifying (S1207), in the updated list, a PSCell mobility command in which a PSCell mobility condition is satisfied; and performing a PSCell mobility based on the identified PSCell mobility command, wherein the updating of the list of the PSCell mobility commands comprises: based on that the index related to the second PSCell mobility command matches an index related to the first PSCell mobility command, replacing at least one parameter value in the first PSCell mobility command with that in the second PSCell mobility command; and based on that the index related to the second PSCell mobility command does not match an index related to any PSCell mobility command in the list, adding the second PSCell mobility command to the list. based on that the index related to the second PSCell mobility command matches an index related to the first PSCell mobility command, replacing at least one parameter value in the first PSCell mobility command with that in the second PSCell mobility command; and based on that the index related to the second PSCell mobility command does not match an index related to any PSCell mobility command in the list, adding the second PSCell mobility command to the list. <EOS>