List of markets currently under review for a potential reclassification as part of the 2017 Annual Market Classification Review: - China A-shares (from Standalone to Emerging Markets) - more info. - Argentina (from Frontier Markets to Emerging Markets) - more info.
It does seem counter-intuitive for a landlord to request that a long term rent-controlled tenant continue to sign a new lease, but counter-intuitive for landlords can be beneficial for tenants. You are protected from nasty rent increases, OMI notices or Ellis notices that become effective before the end of your lease.
Start eviction on both tenants. tell the tenant you want to keep, to give you a deposit and 1st month today, to hold the unit after eviction. (This will reveal if she can actually afford your unit alone) Once the problem tenant vacates your property, you can sign a new lease.