PSOE is trying to balance its policy of concessions with Junts and ERC and firmness against the unilateral path in the electoral pre-campaign.
The Government will appeal to the Constitutional Court against the independence initiative of the Parliament of Catalonia.
The Government didn't take action until over a month after the initiative began to be processed in Parliament.
The appeal can be seen as the first campaign act of the PSOE for the Catalan elections.
PSOE needs to show its opposition to the reactivation of the unilateral path to make the program of its candidate Salvador Illa believable.
Socialists are willing to negotiate a fiscal independence through a Catalan quota, something that is not constitutionally supported.
The appeal has limited reach as Sánchez has agreed to erase the crimes of the independents.
Conclusion: PSOE is trying to prevent the corollary that follows from its own counterproductive agenda of 're-encounter', balancing its policy of concessions and its opposition to the independent unilateral path.