If your Dracaena marginata produces only a single new stem after pruning, the cut was likely too low or not near a growth node.
Photos of your plant and cut sites would help diagnose exactly what's happening.
Choosing an RO System for Large Carnivorous Plant Collections
Mystery Plant Identified: It's a Canna Lily, Not a Banana
Dracaena Marginata Care: Light, Watering, and Moss Removal
Identifying Spanish Thyme or Swedish Ivy: Care for Plectranthus Varieties
Air Layering Techniques: V-Notch, Banding, and Angled Cuts for Root Formation
Identifying a Mystery Houseplant: Large Green Leaves with Coral Stems
Plant Layering Techniques: Simple, Tip, Serpentine, Mound, and Air Layering
Sudden Leaf Drop on Dracaena marginata: Troubleshooting Light, Temperature, and Water
Identifying and Reblooming Calathea crocata 'Candela'
Why Dracaena New Growth Has Smaller Leaves
Variegated Ming Aralia (Polyscias Fruticosa) Identification and Care
Dracaena Marginata Root Rot from Water Globe
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